51769856 has 20 divisors (see below), whose sum is σ = 103439622. Its totient is φ = 25884672.

The previous prime is 51769853. The next prime is 51769867. The reversal of 51769856 is 65896715.

It can be written as a sum of positive squares in only one way, i.e., 51609856 + 160000 = 7184^2 + 400^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51769856.

It is not an unprimeable number, because it can be changed into a prime (51769853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50045 + ... + 51068.

Almost surely, 2^51769856 is an apocalyptic number.

It is an amenable number.

51769856 is a deficient number, since it is larger than the sum of its proper divisors (51669766).

51769856 is an equidigital number, since it uses as much as digits as its factorization.

51769856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101131 (or 101115 counting only the distinct ones).

The product of its digits is 453600, while the sum is 47.

The square root of 51769856 is about 7195.1272400146. The cubic root of 51769856 is about 372.6996506417.

It can be divided in two parts, 51769 and 856, that added together give a palindrome (52625).

The spelling of 51769856 in words is "fifty-one million, seven hundred sixty-nine thousand, eight hundred fifty-six".