51695860 has 48 divisors (see below), whose sum is σ = 111315456. Its totient is φ = 20161152.

The previous prime is 51695857. The next prime is 51695863. The reversal of 51695860 is 6859615.

It is an interprime number because it is at equal distance from previous prime (51695857) and next prime (51695863).

It is a super-2 number, since 2×51695860² = 5344923882279200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51695863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231709 + ... + 231931.

It is an arithmetic number, because the mean of its divisors is an integer number (2319072).

Almost surely, 2^51695860 is an apocalyptic number.

It is an amenable number.

51695860 is an abundant number, since it is smaller than the sum of its proper divisors (59619596).

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

51695860 is a wasteful number, since it uses less digits than its factorization.

51695860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 51695860 is about 7189.9833101336. The cubic root of 51695860 is about 372.5219962087.

The spelling of 51695860 in words is "fifty-one million, six hundred ninety-five thousand, eight hundred sixty".