51577690 has 16 divisors (see below), whose sum is σ = 92948328. Its totient is φ = 20606976.

The previous prime is 51577681. The next prime is 51577697. The reversal of 51577690 is 9677515.

It can be written as a sum of positive squares in 4 ways, for example, as 48622729 + 2954961 = 6973^2 + 1719^2 .

It is a super-2 number, since 2×51577690² = 5320516211472200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51577697) 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 7 ways as a sum of consecutive naturals, for example, 7834 + ... + 12826.

Almost surely, 2^51577690 is an apocalyptic number.

51577690 is a deficient number, since it is larger than the sum of its proper divisors (41370638).

51577690 is a wasteful number, since it uses less digits than its factorization.

51577690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6033.

The product of its (nonzero) digits is 66150, while the sum is 40.

The square root of 51577690 is about 7181.7609261239. The cubic root of 51577690 is about 372.2379340744.

The spelling of 51577690 in words is "fifty-one million, five hundred seventy-seven thousand, six hundred ninety".