51420524 has 6 divisors (see below), whose sum is σ = 89985924. Its totient is φ = 25710260.

The previous prime is 51420511. The next prime is 51420527. The reversal of 51420524 is 42502415.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 51420524.

It is not an unprimeable number, because it can be changed into a prime (51420527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6427562 + ... + 6427569.

It is an arithmetic number, because the mean of its divisors is an integer number (14997654).

Almost surely, 2^51420524 is an apocalyptic number.

It is an amenable number.

51420524 is a deficient number, since it is larger than the sum of its proper divisors (38565400).

51420524 is a wasteful number, since it uses less digits than its factorization.

51420524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12855135 (or 12855133 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 51420524 is about 7170.8105539053. The cubic root of 51420524 is about 371.8594586071.

Adding to 51420524 its reverse (42502415), we get a palindrome (93922939).

The spelling of 51420524 in words is "fifty-one million, four hundred twenty thousand, five hundred twenty-four".