51113644 has 12 divisors (see below), whose sum is σ = 89611704. Its totient is φ = 25510304.

The previous prime is 51113639. The next prime is 51113663. The reversal of 51113644 is 44631115.

It is a super-2 number, since 2×51113644² = 5225209205917472, which contains 22 as substring.

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, 9097 + ... + 13600.

It is an arithmetic number, because the mean of its divisors is an integer number (7467642).

Almost surely, 2^51113644 is an apocalyptic number.

It is an amenable number.

51113644 is a deficient number, since it is larger than the sum of its proper divisors (38498060).

51113644 is a wasteful number, since it uses less digits than its factorization.

51113644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23264 (or 23262 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 51113644 is about 7149.3806724779. The cubic root of 51113644 is about 371.1182240806.

Adding to 51113644 its reverse (44631115), we get a palindrome (95744759).

The spelling of 51113644 in words is "fifty-one million, one hundred thirteen thousand, six hundred forty-four".