51287532 has 12 divisors (see below), whose sum is σ = 119670936. Its totient is φ = 17095840.

The previous prime is 51287503. The next prime is 51287543. The reversal of 51287532 is 23578215.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 51287493 and 51287502.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2136969 + ... + 2136992.

It is an arithmetic number, because the mean of its divisors is an integer number (9972578).

Almost surely, 2^51287532 is an apocalyptic number.

It is an amenable number.

51287532 is an abundant number, since it is smaller than the sum of its proper divisors (68383404).

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

51287532 is a wasteful number, since it uses less digits than its factorization.

51287532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4273968 (or 4273966 counting only the distinct ones).

The product of its digits is 16800, while the sum is 33.

The square root of 51287532 is about 7161.5314004757. The cubic root of 51287532 is about 371.5385943153.

The spelling of 51287532 in words is "fifty-one million, two hundred eighty-seven thousand, five hundred thirty-two".