51100564 has 6 divisors (see below), whose sum is σ = 89425994. Its totient is φ = 25550280.

The previous prime is 51100561. The next prime is 51100571. The reversal of 51100564 is 46500115.

It can be written as a sum of positive squares in only one way, i.e., 46512400 + 4588164 = 6820^2 + 2142^2 .

It is a super-2 number, since 2×51100564² = 5222535282236192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51100561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6387567 + ... + 6387574.

Almost surely, 2^51100564 is an apocalyptic number.

It is an amenable number.

51100564 is a deficient number, since it is larger than the sum of its proper divisors (38325430).

51100564 is a wasteful number, since it uses less digits than its factorization.

51100564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12775145 (or 12775143 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 51100564 is about 7148.4658493973. The cubic root of 51100564 is about 371.0865649506.

Adding to 51100564 its reverse (46500115), we get a palindrome (97600679).

The spelling of 51100564 in words is "fifty-one million, one hundred thousand, five hundred sixty-four".