51395790 has 32 divisors (see below), whose sum is σ = 124449696. Its totient is φ = 13583360.

The previous prime is 51395783. The next prime is 51395803. The reversal of 51395790 is 9759315.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4191 + ... + 10970.

It is an arithmetic number, because the mean of its divisors is an integer number (3889053).

Almost surely, 2^51395790 is an apocalyptic number.

51395790 is an abundant number, since it is smaller than the sum of its proper divisors (73053906).

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

51395790 is a wasteful number, since it uses less digits than its factorization.

51395790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15284.

The product of its (nonzero) digits is 42525, while the sum is 39.

The square root of 51395790 is about 7169.0857157660. The cubic root of 51395790 is about 371.7998258234.

The spelling of 51395790 in words is "fifty-one million, three hundred ninety-five thousand, seven hundred ninety".