51919886 has 16 divisors (see below), whose sum is σ = 79626240. Its totient is φ = 25383960.

The previous prime is 51919883. The next prime is 51919891. The reversal of 51919886 is 68891915.

It is a self number, because there is not a number n which added to its sum of digits gives 51919886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51919883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16595 + ... + 19473.

It is an arithmetic number, because the mean of its divisors is an integer number (4976640).

Almost surely, 2^51919886 is an apocalyptic number.

51919886 is a deficient number, since it is larger than the sum of its proper divisors (27706354).

51919886 is a wasteful number, since it uses less digits than its factorization.

51919886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3079.

The product of its digits is 155520, while the sum is 47.

The square root of 51919886 is about 7205.5455032912. The cubic root of 51919886 is about 373.0593335690.

The spelling of 51919886 in words is "fifty-one million, nine hundred nineteen thousand, eight hundred eighty-six".