51313072 has 40 divisors (see below), whose sum is σ = 110818800. Its totient is φ = 22874112.

The previous prime is 51313033. The next prime is 51313081. The reversal of 51313072 is 27031315.

It is a congruent number.

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, 204 + ... + 10132.

It is an arithmetic number, because the mean of its divisors is an integer number (2770470).

Almost surely, 2^51313072 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 51313072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55409400).

51313072 is an abundant number, since it is smaller than the sum of its proper divisors (59505728).

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

51313072 is a wasteful number, since it uses less digits than its factorization.

51313072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9973 (or 9967 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 51313072 is about 7163.3143167112. The cubic root of 51313072 is about 371.6002566118.

Adding to 51313072 its reverse (27031315), we get a palindrome (78344387).

The spelling of 51313072 in words is "fifty-one million, three hundred thirteen thousand, seventy-two".