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30215125 = 533747139
BaseRepresentation
bin111001101000…
…0101111010101
32002212002100201
41303100233111
530213341000
62555340501
7514552513
oct163205725
962762321
1030215125
1116068086
12a151731
13634bb95
1440274b3
1529bc96a
hex1cd0bd5

30215125 has 32 divisors (see below), whose sum is σ = 39836160. Its totient is φ = 22852800.

The previous prime is 30215117. The next prime is 30215161. The reversal of 30215125 is 52151203.

It is not a de Polignac number, because 30215125 - 23 = 30215117 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 217306 + ... + 217444.

It is an arithmetic number, because the mean of its divisors is an integer number (1244880).

Almost surely, 230215125 is an apocalyptic number.

It is an amenable number.

30215125 is a deficient number, since it is larger than the sum of its proper divisors (9621035).

30215125 is a wasteful number, since it uses less digits than its factorization.

30215125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 30215125 is about 5496.8286311290. The cubic root of 30215125 is about 311.4641972202.

Adding to 30215125 its reverse (52151203), we get a palindrome (82366328).

The spelling of 30215125 in words is "thirty million, two hundred fifteen thousand, one hundred twenty-five".

Divisors: 1 5 25 37 47 125 139 185 235 695 925 1175 1739 3475 4625 5143 5875 6533 8695 17375 25715 32665 43475 128575 163325 217375 241721 642875 816625 1208605 6043025 30215125