51190785 has 20 divisors (see below), whose sum is σ = 91764948. Its totient is φ = 27301536.

The previous prime is 51190729. The next prime is 51190817. The reversal of 51190785 is 58709115.

It can be written as a sum of positive squares in 2 ways, for example, as 15046641 + 36144144 = 3879^2 + 6012^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51190785 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 62794 + ... + 63603.

Almost surely, 2^51190785 is an apocalyptic number.

It is an amenable number.

51190785 is a deficient number, since it is larger than the sum of its proper divisors (40574163).

51190785 is a wasteful number, since it uses less digits than its factorization.

51190785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126414 (or 126405 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 36.

The square root of 51190785 is about 7154.7735813232. The cubic root of 51190785 is about 371.3048281435.

The spelling of 51190785 in words is "fifty-one million, one hundred ninety thousand, seven hundred eighty-five".