51393311252 has 24 divisors (see below), whose sum is σ = 95235857640. Its totient is φ = 24183290880.

The previous prime is 51393311231. The next prime is 51393311273. The reversal of 51393311252 is 25211339315.

It is an interprime number because it is at equal distance from previous prime (51393311231) and next prime (51393311273).

It can be written as a sum of positive squares in 4 ways, for example, as 25537957636 + 25855353616 = 159806^2 + 160796^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1505024 + ... + 1538792.

It is an arithmetic number, because the mean of its divisors is an integer number (3968160735).

Almost surely, 2^51393311252 is an apocalyptic number.

It is an amenable number.

51393311252 is a deficient number, since it is larger than the sum of its proper divisors (43842546388).

51393311252 is a wasteful number, since it uses less digits than its factorization.

51393311252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56171 (or 56169 counting only the distinct ones).

The product of its digits is 24300, while the sum is 35.

The spelling of 51393311252 in words is "fifty-one billion, three hundred ninety-three million, three hundred eleven thousand, two hundred fifty-two".