51497264 has 80 divisors (see below), whose sum is σ = 124283712. Its totient is φ = 20127744.

The previous prime is 51497263. The next prime is 51497309. The reversal of 51497264 is 46279415.

Its product of digits (60480) is a multiple of the sum of its prime divisors (448).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51497263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164372 + ... + 164684.

Almost surely, 2^51497264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51497264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62141856).

51497264 is an abundant number, since it is smaller than the sum of its proper divisors (72786448).

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

51497264 is a wasteful number, since it uses less digits than its factorization.

51497264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454 (or 448 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The square root of 51497264 is about 7176.1594185191. The cubic root of 51497264 is about 372.0443543675.

The spelling of 51497264 in words is "fifty-one million, four hundred ninety-seven thousand, two hundred sixty-four".