97815256 has 32 divisors (see below), whose sum is σ = 228660480. Its totient is φ = 38109600.

The previous prime is 97815253. The next prime is 97815259. The reversal of 97815256 is 65251879.

It is an interprime number because it is at equal distance from previous prime (97815253) and next prime (97815259).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97815253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78780 + ... + 80011.

It is an arithmetic number, because the mean of its divisors is an integer number (7145640).

Almost surely, 2^97815256 is an apocalyptic number.

It is an amenable number.

97815256 is an abundant number, since it is smaller than the sum of its proper divisors (130845224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97815256 is a wasteful number, since it uses less digits than its factorization.

97815256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158815 (or 158811 counting only the distinct ones).

The product of its digits is 151200, while the sum is 43.

The square root of 97815256 is about 9890.1595538191. The cubic root of 97815256 is about 460.7537359312.

The spelling of 97815256 in words is "ninety-seven million, eight hundred fifteen thousand, two hundred fifty-six".