51130644 has 24 divisors (see below), whose sum is σ = 120488928. Its totient is φ = 16874400.

The previous prime is 51130643. The next prime is 51130711. The reversal of 51130644 is 44603115.

It is a super-2 number, since 2×51130644² = 5228685511709472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51130643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19882 + ... + 22305.

It is an arithmetic number, because the mean of its divisors is an integer number (5020372).

Almost surely, 2^51130644 is an apocalyptic number.

It is an amenable number.

51130644 is an abundant number, since it is smaller than the sum of its proper divisors (69358284).

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

51130644 is a wasteful number, since it uses less digits than its factorization.

51130644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42295 (or 42293 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 51130644 is about 7150.5694878100. The cubic root of 51130644 is about 371.1593631973.

Adding to 51130644 its reverse (44603115), we get a palindrome (95733759).

The spelling of 51130644 in words is "fifty-one million, one hundred thirty thousand, six hundred forty-four".