51590394 has 24 divisors (see below), whose sum is σ = 112268052. Its totient is φ = 17121600.

The previous prime is 51590387. The next prime is 51590401. The reversal of 51590394 is 49309515.

It is an interprime number because it is at equal distance from previous prime (51590387) and next prime (51590401).

It can be written as a sum of positive squares in 2 ways, for example, as 48818169 + 2772225 = 6987^2 + 1665^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1957 + ... + 10344.

Almost surely, 2^51590394 is an apocalyptic number.

51590394 is an abundant number, since it is smaller than the sum of its proper divisors (60677658).

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

51590394 is a wasteful number, since it uses less digits than its factorization.

51590394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12542 (or 12539 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 51590394 is about 7182.6453344154. The cubic root of 51590394 is about 372.2684932981.

It can be divided in two parts, 51590 and 394, that added together give a square (51984 = 228²).

The spelling of 51590394 in words is "fifty-one million, five hundred ninety thousand, three hundred ninety-four".