51490684 has 24 divisors (see below), whose sum is σ = 108402560. Its totient is φ = 20905776.

The previous prime is 51490667. The next prime is 51490697. The reversal of 51490684 is 48609415.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47862 + ... + 48925.

Almost surely, 2^51490684 is an apocalyptic number.

It is an amenable number.

51490684 is an abundant number, since it is smaller than the sum of its proper divisors (56911876).

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

51490684 is a wasteful number, since it uses less digits than its factorization.

51490684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96817 (or 96815 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 51490684 is about 7175.7009413715. The cubic root of 51490684 is about 372.0285078550.

The spelling of 51490684 in words is "fifty-one million, four hundred ninety thousand, six hundred eighty-four".