51497656 has 32 divisors (see below), whose sum is σ = 110592000. Its totient is φ = 22022496.

The previous prime is 51497647. The next prime is 51497659. The reversal of 51497656 is 65679415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51497659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39625 + ... + 40903.

It is an arithmetic number, because the mean of its divisors is an integer number (3456000).

Almost surely, 2^51497656 is an apocalyptic number.

51497656 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51497656 is an abundant number, since it is smaller than the sum of its proper divisors (59094344).

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

51497656 is a wasteful number, since it uses less digits than its factorization.

51497656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011 (or 2007 counting only the distinct ones).

The product of its digits is 226800, while the sum is 43.

The square root of 51497656 is about 7176.1867311268. The cubic root of 51497656 is about 372.0452983725.

The spelling of 51497656 in words is "fifty-one million, four hundred ninety-seven thousand, six hundred fifty-six".