215116925 has 12 divisors (see below), whose sum is σ = 275944020. Its totient is φ = 166158720.

The previous prime is 215116919. The next prime is 215116931. The reversal of 215116925 is 529611512.

It is an interprime number because it is at equal distance from previous prime (215116919) and next prime (215116931).

It can be written as a sum of positive squares in 6 ways, for example, as 465124 + 214651801 = 682^2 + 14651^2 .

It is not a de Polignac number, because 215116925 - 2⁸ = 215116669 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 215116891 and 215116900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147632 + ... + 149081.

It is an arithmetic number, because the mean of its divisors is an integer number (22995335).

Almost surely, 2^215116925 is an apocalyptic number.

215116925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

215116925 is a deficient number, since it is larger than the sum of its proper divisors (60827095).

215116925 is a wasteful number, since it uses less digits than its factorization.

215116925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296752 (or 296747 counting only the distinct ones).

The product of its digits is 5400, while the sum is 32.

The square root of 215116925 is about 14666.8648660850. The cubic root of 215116925 is about 599.1812211398.

The spelling of 215116925 in words is "two hundred fifteen million, one hundred sixteen thousand, nine hundred twenty-five".