51577972 has 12 divisors (see below), whose sum is σ = 90316996. Its totient is φ = 25773120.

The previous prime is 51577961. The next prime is 51577987. The reversal of 51577972 is 27977515.

It can be written as a sum of positive squares in 2 ways, for example, as 35928036 + 15649936 = 5994^2 + 3956^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6298 + ... + 11950.

Almost surely, 2^51577972 is an apocalyptic number.

It is an amenable number.

51577972 is a deficient number, since it is larger than the sum of its proper divisors (38739024).

51577972 is a wasteful number, since it uses less digits than its factorization.

51577972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7938 (or 7936 counting only the distinct ones).

The product of its digits is 154350, while the sum is 43.

The square root of 51577972 is about 7181.7805591650. The cubic root of 51577972 is about 372.2386124743.

It can be divided in two parts, 515 and 77972, that added together give a palindrome (78487).

The spelling of 51577972 in words is "fifty-one million, five hundred seventy-seven thousand, nine hundred seventy-two".