51315156 has 36 divisors (see below), whose sum is σ = 129965472. Its totient is φ = 17071824.

The previous prime is 51315113. The next prime is 51315157. The reversal of 51315156 is 65151315.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51315157) 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 11 ways as a sum of consecutive naturals, for example, 23545 + ... + 25631.

It is an arithmetic number, because the mean of its divisors is an integer number (3610152).

Almost surely, 2^51315156 is an apocalyptic number.

It is an amenable number.

51315156 is an abundant number, since it is smaller than the sum of its proper divisors (78650316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51315156 is a wasteful number, since it uses less digits than its factorization.

51315156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2780 (or 2775 counting only the distinct ones).

The product of its digits is 2250, while the sum is 27.

The square root of 51315156 is about 7163.4597786265. The cubic root of 51315156 is about 371.6052871977.

The spelling of 51315156 in words is "fifty-one million, three hundred fifteen thousand, one hundred fifty-six".