51456136 has 8 divisors (see below), whose sum is σ = 96480270. Its totient is φ = 25728064.

The previous prime is 51456113. The next prime is 51456137. The reversal of 51456136 is 63165415.

It can be written as a sum of positive squares in only one way, i.e., 32148900 + 19307236 = 5670^2 + 4394^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 51456098 and 51456107.

It is not an unprimeable number, because it can be changed into a prime (51456137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3216001 + ... + 3216016.

Almost surely, 2^51456136 is an apocalyptic number.

It is an amenable number.

51456136 is a deficient number, since it is larger than the sum of its proper divisors (45024134).

51456136 is a wasteful number, since it uses less digits than its factorization.

51456136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6432023 (or 6432019 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 51456136 is about 7173.2932464803. The cubic root of 51456136 is about 371.9452842792.

The spelling of 51456136 in words is "fifty-one million, four hundred fifty-six thousand, one hundred thirty-six".