51530712 has 32 divisors (see below), whose sum is σ = 129973680. Its totient is φ = 17024000.

The previous prime is 51530707. The next prime is 51530719. The reversal of 51530712 is 21703515.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51530719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6789 + ... + 12212.

Almost surely, 2^51530712 is an apocalyptic number.

It is an amenable number.

51530712 is an abundant number, since it is smaller than the sum of its proper divisors (78442968).

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

51530712 is a wasteful number, since it uses less digits than its factorization.

51530712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19123 (or 19119 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 51530712 is about 7178.4895347141. The cubic root of 51530712 is about 372.1248858066.

The spelling of 51530712 in words is "fifty-one million, five hundred thirty thousand, seven hundred twelve".