51356488 has 8 divisors (see below), whose sum is σ = 96293430. Its totient is φ = 25678240.

The previous prime is 51356479. The next prime is 51356489. The reversal of 51356488 is 88465315.

It can be written as a sum of positive squares in only one way, i.e., 42224004 + 9132484 = 6498^2 + 3022^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 51356488.

It is not an unprimeable number, because it can be changed into a prime (51356489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3209773 + ... + 3209788.

Almost surely, 2^51356488 is an apocalyptic number.

It is an amenable number.

51356488 is a deficient number, since it is larger than the sum of its proper divisors (44936942).

51356488 is a wasteful number, since it uses less digits than its factorization.

51356488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6419567 (or 6419563 counting only the distinct ones).

The product of its digits is 115200, while the sum is 40.

The square root of 51356488 is about 7166.3441167725. The cubic root of 51356488 is about 371.7050307502.

The spelling of 51356488 in words is "fifty-one million, three hundred fifty-six thousand, four hundred eighty-eight".