51971412 has 24 divisors (see below), whose sum is σ = 122342976. Its totient is φ = 17170048.

The previous prime is 51971399. The next prime is 51971443. The reversal of 51971412 is 21417915.

It is a self number, because there is not a number n which added to its sum of digits gives 51971412.

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, 17808 + ... + 20519.

It is an arithmetic number, because the mean of its divisors is an integer number (5097624).

Almost surely, 2^51971412 is an apocalyptic number.

It is an amenable number.

51971412 is an abundant number, since it is smaller than the sum of its proper divisors (70371564).

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

51971412 is a wasteful number, since it uses less digits than its factorization.

51971412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38447 (or 38445 counting only the distinct ones).

The product of its digits is 2520, while the sum is 30.

The square root of 51971412 is about 7209.1200572608. The cubic root of 51971412 is about 373.1827024835.

The spelling of 51971412 in words is "fifty-one million, nine hundred seventy-one thousand, four hundred twelve".