51157244 has 24 divisors (see below), whose sum is σ = 95413248. Its totient is φ = 23943920.

The previous prime is 51157237. The next prime is 51157279. The reversal of 51157244 is 44275115.

51157244 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51157244² = 5234127227351072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1592 + ... + 10239.

It is an arithmetic number, because the mean of its divisors is an integer number (3975552).

Almost surely, 2^51157244 is an apocalyptic number.

It is an amenable number.

51157244 is a deficient number, since it is larger than the sum of its proper divisors (44256004).

51157244 is a wasteful number, since it uses less digits than its factorization.

51157244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11905 (or 11903 counting only the distinct ones).

The product of its digits is 5600, while the sum is 29.

The square root of 51157244 is about 7152.4292376786. The cubic root of 51157244 is about 371.2237155224.

The spelling of 51157244 in words is "fifty-one million, one hundred fifty-seven thousand, two hundred forty-four".