51107712 has 64 divisors (see below), whose sum is σ = 143758800. Its totient is φ = 16031744.

The previous prime is 51107711. The next prime is 51107737. The reversal of 51107712 is 21770115.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×51107712² = 5223996451749888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51107711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2614 + ... + 10442.

Almost surely, 2^51107712 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 51107712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71879400).

51107712 is an abundant number, since it is smaller than the sum of its proper divisors (92651088).

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

51107712 is a wasteful number, since it uses less digits than its factorization.

51107712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7863 (or 7851 counting only the distinct ones).

The product of its (nonzero) digits is 490, while the sum is 24.

The square root of 51107712 is about 7148.9657993307. The cubic root of 51107712 is about 371.1038668020.

Adding to 51107712 its reverse (21770115), we get a palindrome (72877827).

The spelling of 51107712 in words is "fifty-one million, one hundred seven thousand, seven hundred twelve".