51631560 has 64 divisors (see below), whose sum is σ = 172108800. Its totient is φ = 13768128.

The previous prime is 51631543. The next prime is 51631577. The reversal of 51631560 is 6513615.

It is a happy number.

51631560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51631543) and next prime (51631577).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 22824 + ... + 24983.

It is an arithmetic number, because the mean of its divisors is an integer number (2689200).

Almost surely, 2^51631560 is an apocalyptic number.

It is an amenable number.

51631560 is an abundant number, since it is smaller than the sum of its proper divisors (120477240).

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

51631560 is a wasteful number, since it uses less digits than its factorization.

51631560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47827 (or 47817 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 51631560 is about 7185.5104202833. The cubic root of 51631560 is about 372.3674828537.

The spelling of 51631560 in words is "fifty-one million, six hundred thirty-one thousand, five hundred sixty".