13215430525 has 24 divisors (see below), whose sum is σ = 18817768800. Its totient is φ = 9105364800.

The previous prime is 13215430513. The next prime is 13215430561. The reversal of 13215430525 is 52503451231.

It is not a de Polignac number, because 13215430525 - 2¹⁵ = 13215397757 is a prime.

It is a super-2 number, since 2×13215430525² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1259410 + ... + 1269859.

It is an arithmetic number, because the mean of its divisors is an integer number (784073700).

Almost surely, 2^13215430525 is an apocalyptic number.

It is an amenable number.

13215430525 is a deficient number, since it is larger than the sum of its proper divisors (5602338275).

13215430525 is a wasteful number, since it uses less digits than its factorization.

13215430525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2529309 (or 2529304 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 13215430525 its reverse (52503451231), we get a palindrome (65718881756).

The spelling of 13215430525 in words is "thirteen billion, two hundred fifteen million, four hundred thirty thousand, five hundred twenty-five".