51125312 has 56 divisors (see below), whose sum is σ = 116921280. Its totient is φ = 21726720.

The previous prime is 51125303. The next prime is 51125339. The reversal of 51125312 is 21352115.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×51125312² = 5227595054194688, 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, 61862 + ... + 62682.

It is an arithmetic number, because the mean of its divisors is an integer number (2087880).

Almost surely, 2^51125312 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 51125312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58460640).

51125312 is an abundant number, since it is smaller than the sum of its proper divisors (65795968).

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

51125312 is a wasteful number, since it uses less digits than its factorization.

51125312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979 (or 969 counting only the distinct ones).

The product of its digits is 300, while the sum is 20.

The square root of 51125312 is about 7150.1966406526. The cubic root of 51125312 is about 371.1464610159.

Adding to 51125312 its reverse (21352115), we get a palindrome (72477427).

The spelling of 51125312 in words is "fifty-one million, one hundred twenty-five thousand, three hundred twelve".