56691250 has 160 divisors (see below), whose sum is σ = 143953920. Its totient is φ = 16200000.

The previous prime is 56691223. The next prime is 56691263. The reversal of 56691250 is 5219665.

It is a happy number.

It is a super-3 number, since 3×56691250³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1828735 + ... + 1828765.

It is an arithmetic number, because the mean of its divisors is an integer number (899712).

Almost surely, 2^56691250 is an apocalyptic number.

56691250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

56691250 is an abundant number, since it is smaller than the sum of its proper divisors (87262670).

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

56691250 is a wasteful number, since it uses less digits than its factorization.

56691250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 56691250 is about 7529.3592024820. The cubic root of 56691250 is about 384.1539864554.

The spelling of 56691250 in words is "fifty-six million, six hundred ninety-one thousand, two hundred fifty".