51232620 has 48 divisors (see below), whose sum is σ = 144506880. Its totient is φ = 13561536.

The previous prime is 51232613. The next prime is 51232631. The reversal of 51232620 is 2623215.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5269 + ... + 11411.

It is an arithmetic number, because the mean of its divisors is an integer number (3010560).

Almost surely, 2^51232620 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 51232620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72253440).

51232620 is an abundant number, since it is smaller than the sum of its proper divisors (93274260).

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

51232620 is a wasteful number, since it uses less digits than its factorization.

51232620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6294 (or 6292 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 51232620 is about 7157.6965568540. The cubic root of 51232620 is about 371.4059486080.

Adding to 51232620 its reverse (2623215), we get a palindrome (53855835).

The spelling of 51232620 in words is "fifty-one million, two hundred thirty-two thousand, six hundred twenty".