51213474 has 48 divisors (see below), whose sum is σ = 125798400. Its totient is φ = 14927328.

The previous prime is 51213451. The next prime is 51213497. The reversal of 51213474 is 47431215.

It is an interprime number because it is at equal distance from previous prime (51213451) and next prime (51213497).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1314 + ... + 10205.

It is an arithmetic number, because the mean of its divisors is an integer number (2620800).

Almost surely, 2^51213474 is an apocalyptic number.

51213474 is an abundant number, since it is smaller than the sum of its proper divisors (74584926).

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

51213474 is a wasteful number, since it uses less digits than its factorization.

51213474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11559 (or 11556 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 51213474 is about 7156.3589904364. The cubic root of 51213474 is about 371.3596771487.

Adding to 51213474 its reverse (47431215), we get a palindrome (98644689).

The spelling of 51213474 in words is "fifty-one million, two hundred thirteen thousand, four hundred seventy-four".