51642374 has 12 divisors (see below), whose sum is σ = 90110844. Its totient is φ = 22132404.

The previous prime is 51642341. The next prime is 51642401. The reversal of 51642374 is 47324615.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51642374.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 263384 + ... + 263579.

It is an arithmetic number, because the mean of its divisors is an integer number (7509237).

Almost surely, 2^51642374 is an apocalyptic number.

51642374 is a deficient number, since it is larger than the sum of its proper divisors (38468470).

51642374 is a wasteful number, since it uses less digits than its factorization.

51642374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526979 (or 526972 counting only the distinct ones).

The product of its digits is 20160, while the sum is 32.

The square root of 51642374 is about 7186.2628674437. The cubic root of 51642374 is about 372.3934779418.

Adding to 51642374 its reverse (47324615), we get a palindrome (98966989).

The spelling of 51642374 in words is "fifty-one million, six hundred forty-two thousand, three hundred seventy-four".