51690958 has 12 divisors (see below), whose sum is σ = 85226400. Its totient is φ = 23495780.

The previous prime is 51690949. The next prime is 51690979. The reversal of 51690958 is 85909615.

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 5 ways as a sum of consecutive naturals, for example, 106558 + ... + 107041.

It is an arithmetic number, because the mean of its divisors is an integer number (7102200).

Almost surely, 2^51690958 is an apocalyptic number.

51690958 is a deficient number, since it is larger than the sum of its proper divisors (33535442).

51690958 is a wasteful number, since it uses less digits than its factorization.

51690958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213623 (or 213612 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 51690958 is about 7189.6424111356. The cubic root of 51690958 is about 372.5102211810.

The spelling of 51690958 in words is "fifty-one million, six hundred ninety thousand, nine hundred fifty-eight".