51130664 has 32 divisors (see below), whose sum is σ = 103700520. Its totient is φ = 23494656.

The previous prime is 51130643. The next prime is 51130711. The reversal of 51130664 is 46603115.

It can be written as a sum of positive squares in 4 ways, for example, as 51008164 + 122500 = 7142^2 + 350^2 .

It is a super-2 number, since 2×51130664² = 5228689602161792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25772 + ... + 27684.

Almost surely, 2^51130664 is an apocalyptic number.

It is an amenable number.

51130664 is an abundant number, since it is smaller than the sum of its proper divisors (52569856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51130664 is a wasteful number, since it uses less digits than its factorization.

51130664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189 (or 2185 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 51130664 is about 7150.5708862999. The cubic root of 51130664 is about 371.1594115909.

Adding to 51130664 its reverse (46603115), we get a palindrome (97733779).

The spelling of 51130664 in words is "fifty-one million, one hundred thirty thousand, six hundred sixty-four".