51199145582 has 32 divisors (see below), whose sum is σ = 87594206112. Its totient is φ = 22234558464.

The previous prime is 51199145573. The next prime is 51199145639. The reversal of 51199145582 is 28554199115.

It is a self number, because there is not a number n which added to its sum of digits gives 51199145582.

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, 1981913 + ... + 2007579.

It is an arithmetic number, because the mean of its divisors is an integer number (2737318941).

Almost surely, 2^51199145582 is an apocalyptic number.

51199145582 is a deficient number, since it is larger than the sum of its proper divisors (36395060530).

51199145582 is a wasteful number, since it uses less digits than its factorization.

51199145582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30212.

The product of its digits is 648000, while the sum is 50.

The spelling of 51199145582 in words is "fifty-one billion, one hundred ninety-nine million, one hundred forty-five thousand, five hundred eighty-two".