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229371025 = 521322332
BaseRepresentation
bin11011010101111…
…10110010010001
3120222121020220011
431222332302101
5432204333100
634432114521
75453423122
oct1552766221
9528536804
10229371025
11108523934
1264995a41
133869bc00
142266a049
151520bbba
hexdabec91

229371025 has 27 divisors (see below), whose sum is σ = 309308979. Its totient is φ = 168654720.

The previous prime is 229371013. The next prime is 229371031. The reversal of 229371025 is 520173922.

The square root of 229371025 is 15145.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 228402769 + 968256 = 15113^2 + 984^2 .

It is not a de Polignac number, because 229371025 - 215 = 229338257 is a prime.

It is a super-2 number, since 2×2293710252 = 105222134219101250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 984309 + ... + 984541.

Almost surely, 2229371025 is an apocalyptic number.

229371025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

229371025 is the 15145-th square number.

229371025 is the 7573-rd centered octagonal number.

It is an amenable number.

229371025 is a deficient number, since it is larger than the sum of its proper divisors (79937954).

229371025 is an equidigital number, since it uses as much as digits as its factorization.

229371025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The cubic root of 229371025 is about 612.1335528448.

The spelling of 229371025 in words is "two hundred twenty-nine million, three hundred seventy-one thousand, twenty-five".

Divisors: 1 5 13 25 65 169 233 325 845 1165 3029 4225 5825 15145 39377 54289 75725 196885 271445 705757 984425 1357225 3528785 9174841 17643925 45874205 229371025