51312515444 has 12 divisors (see below), whose sum is σ = 89814900000. Its totient is φ = 25651115448.

The previous prime is 51312515431. The next prime is 51312515453. The reversal of 51312515444 is 44451521315.

It is a happy number.

It is a super-3 number, since 3×51312515444³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1263074 + ... + 1303065.

It is an arithmetic number, because the mean of its divisors is an integer number (7484575000).

Almost surely, 2^51312515444 is an apocalyptic number.

It is an amenable number.

51312515444 is a deficient number, since it is larger than the sum of its proper divisors (38502384556).

51312515444 is a wasteful number, since it uses less digits than its factorization.

51312515444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571142 (or 2571140 counting only the distinct ones).

The product of its digits is 48000, while the sum is 35.

The spelling of 51312515444 in words is "fifty-one billion, three hundred twelve million, five hundred fifteen thousand, four hundred forty-four".