51315348 has 72 divisors (see below), whose sum is σ = 140307552. Its totient is φ = 14554176.

The previous prime is 51315317. The next prime is 51315359. The reversal of 51315348 is 84351315.

It is a super-2 number, since 2×51315348² = 5266529880722208, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115615 + ... + 116057.

It is an arithmetic number, because the mean of its divisors is an integer number (1948716).

Almost surely, 2^51315348 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 51315348, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70153776).

51315348 is an abundant number, since it is smaller than the sum of its proper divisors (88992204).

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

51315348 is a wasteful number, since it uses less digits than its factorization.

51315348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661 (or 652 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 51315348 is about 7163.4731799596. The cubic root of 51315348 is about 371.6057506614.

The spelling of 51315348 in words is "fifty-one million, three hundred fifteen thousand, three hundred forty-eight".