51265290 has 32 divisors (see below), whose sum is σ = 123264576. Its totient is φ = 13645440.

The previous prime is 51265283. The next prime is 51265309. The reversal of 51265290 is 9256215.

It is a happy number.

51265290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 19494 + ... + 21966.

It is an arithmetic number, because the mean of its divisors is an integer number (3852018).

Almost surely, 2^51265290 is an apocalyptic number.

51265290 is an abundant number, since it is smaller than the sum of its proper divisors (71999286).

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

51265290 is a wasteful number, since it uses less digits than its factorization.

51265290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3174.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 51265290 is about 7159.9783519226. The cubic root of 51265290 is about 371.4848778403.

The spelling of 51265290 in words is "fifty-one million, two hundred sixty-five thousand, two hundred ninety".