51012564 has 24 divisors (see below), whose sum is σ = 119235648. Its totient is φ = 16974720.

The previous prime is 51012517. The next prime is 51012581. The reversal of 51012564 is 46521015.

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, 4204 + ... + 10940.

It is an arithmetic number, because the mean of its divisors is an integer number (4968152).

Almost surely, 2^51012564 is an apocalyptic number.

It is an amenable number.

51012564 is an abundant number, since it is smaller than the sum of its proper divisors (68223084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51012564 is a wasteful number, since it uses less digits than its factorization.

51012564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7375 (or 7373 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 51012564 is about 7142.3080303219. The cubic root of 51012564 is about 370.8734271789.

Adding to 51012564 its reverse (46521015), we get a palindrome (97533579).

The spelling of 51012564 in words is "fifty-one million, twelve thousand, five hundred sixty-four".