51455956 has 6 divisors (see below), whose sum is σ = 90047930. Its totient is φ = 25727976.

The previous prime is 51455941. The next prime is 51455959. The reversal of 51455956 is 65955415.

It can be written as a sum of positive squares in only one way, i.e., 46703556 + 4752400 = 6834^2 + 2180^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51455959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6431991 + ... + 6431998.

Almost surely, 2^51455956 is an apocalyptic number.

It is an amenable number.

51455956 is a deficient number, since it is larger than the sum of its proper divisors (38591974).

51455956 is a wasteful number, since it uses less digits than its factorization.

51455956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12863993 (or 12863991 counting only the distinct ones).

The product of its digits is 135000, while the sum is 40.

The square root of 51455956 is about 7173.2806999308. The cubic root of 51455956 is about 371.9448505750.

The spelling of 51455956 in words is "fifty-one million, four hundred fifty-five thousand, nine hundred fifty-six".