51502472 has 32 divisors (see below), whose sum is σ = 111446400. Its totient is φ = 21855744.

The previous prime is 51502453. The next prime is 51502513. The reversal of 51502472 is 27420515.

It is a super-2 number, since 2×51502472² = 5305009244221568, which contains 22 as substring.

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, 1304 + ... + 10232.

It is an arithmetic number, because the mean of its divisors is an integer number (3482700).

Almost surely, 2^51502472 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 51502472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55723200).

51502472 is an abundant number, since it is smaller than the sum of its proper divisors (59943928).

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

51502472 is a wasteful number, since it uses less digits than its factorization.

51502472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9045 (or 9041 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 51502472 is about 7176.5222775381. The cubic root of 51502472 is about 372.0568957567.

Adding to 51502472 its reverse (27420515), we get a palindrome (78922987).

The spelling of 51502472 in words is "fifty-one million, five hundred two thousand, four hundred seventy-two".