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252253521 = 3413239557
BaseRepresentation
bin11110000100100…
…01010101010001
3122120122210210000
433002101111101
51004034103041
641010400213
76152056002
oct1702212521
9576583700
10252253521
1111a432893
1270590069
1340351350
14257051a9
151722bbb6
hexf091551

252253521 has 20 divisors (see below), whose sum is σ = 405811252. Its totient is φ = 155232288.

The previous prime is 252253511. The next prime is 252253543. The reversal of 252253521 is 125352252.

It can be written as a sum of positive squares in 2 ways, for example, as 51322896 + 200930625 = 7164^2 + 14175^2 .

It is not a de Polignac number, because 252253521 - 214 = 252237137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252253511) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 118726 + ... + 120831.

Almost surely, 2252253521 is an apocalyptic number.

It is an amenable number.

252253521 is a deficient number, since it is larger than the sum of its proper divisors (153557731).

252253521 is a wasteful number, since it uses less digits than its factorization.

252253521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239582 (or 239573 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 252253521 is about 15882.4910199880. The cubic root of 252253521 is about 631.8477048851.

The spelling of 252253521 in words is "two hundred fifty-two million, two hundred fifty-three thousand, five hundred twenty-one".