51531776 has 52 divisors (see below), whose sum is σ = 107728032. Its totient is φ = 24600576.

The previous prime is 51531769. The next prime is 51531797. The reversal of 51531776 is 67713515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93935 + ... + 94481.

Almost surely, 2^51531776 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 51531776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53864016).

51531776 is an abundant number, since it is smaller than the sum of its proper divisors (56196256).

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

51531776 is an equidigital number, since it uses as much as digits as its factorization.

51531776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594 (or 572 counting only the distinct ones).

The product of its digits is 22050, while the sum is 35.

The square root of 51531776 is about 7178.5636446298. The cubic root of 51531776 is about 372.1274469858.

The spelling of 51531776 in words is "fifty-one million, five hundred thirty-one thousand, seven hundred seventy-six".