51532736 has 42 divisors (see below), whose sum is σ = 105034080. Its totient is φ = 25085440.

The previous prime is 51532717. The next prime is 51532781. The reversal of 51532736 is 63723515.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107345 + ... + 107823.

Almost surely, 2^51532736 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 51532736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52517040).

51532736 is an abundant number, since it is smaller than the sum of its proper divisors (53501344).

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

51532736 is an equidigital number, since it uses as much as digits as its factorization.

51532736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573 (or 522 counting only the distinct ones).

The product of its digits is 18900, while the sum is 32.

The square root of 51532736 is about 7178.6305100625. The cubic root of 51532736 is about 372.1297577938.

The spelling of 51532736 in words is "fifty-one million, five hundred thirty-two thousand, seven hundred thirty-six".