51516244 has 24 divisors (see below), whose sum is σ = 97499808. Its totient is φ = 23676000.

The previous prime is 51516221. The next prime is 51516271. The reversal of 51516244 is 44261515.

It is a congruent number.

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, 11079 + ... + 15025.

It is an arithmetic number, because the mean of its divisors is an integer number (4062492).

Almost surely, 2^51516244 is an apocalyptic number.

It is an amenable number.

51516244 is a deficient number, since it is larger than the sum of its proper divisors (45983564).

51516244 is a wasteful number, since it uses less digits than its factorization.

51516244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4215 (or 4213 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 51516244 is about 7177.4817310809. The cubic root of 51516244 is about 372.0900560479.

Adding to 51516244 its reverse (44261515), we get a palindrome (95777759).

The spelling of 51516244 in words is "fifty-one million, five hundred sixteen thousand, two hundred forty-four".