51915072 has 112 divisors (see below), whose sum is σ = 153326592. Its totient is φ = 15367680.

The previous prime is 51915067. The next prime is 51915077. The reversal of 51915072 is 27051915.

It is an interprime number because it is at equal distance from previous prime (51915067) and next prime (51915077).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51915077) 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, 99003 + ... + 99525.

Almost surely, 2^51915072 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 51915072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76663296).

51915072 is an abundant number, since it is smaller than the sum of its proper divisors (101411520).

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

51915072 is a wasteful number, since it uses less digits than its factorization.

51915072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 586 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 30.

The square root of 51915072 is about 7205.2114472790. The cubic root of 51915072 is about 373.0478032205.

Adding to 51915072 its reverse (27051915), we get a palindrome (78966987).

The spelling of 51915072 in words is "fifty-one million, nine hundred fifteen thousand, seventy-two".