51212572 has 12 divisors (see below), whose sum is σ = 89827416. Its totient is φ = 25547600.

The previous prime is 51212561. The next prime is 51212573. The reversal of 51212572 is 27521215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51212573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12679 + ... + 16222.

It is an arithmetic number, because the mean of its divisors is an integer number (7485618).

Almost surely, 2^51212572 is an apocalyptic number.

It is an amenable number.

51212572 is a deficient number, since it is larger than the sum of its proper divisors (38614844).

51212572 is a wasteful number, since it uses less digits than its factorization.

51212572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29348 (or 29346 counting only the distinct ones).

The product of its digits is 1400, while the sum is 25.

The square root of 51212572 is about 7156.2959692847. The cubic root of 51212572 is about 371.3574969386.

Adding to 51212572 its reverse (27521215), we get a palindrome (78733787).

The spelling of 51212572 in words is "fifty-one million, two hundred twelve thousand, five hundred seventy-two".