51513924 has 96 divisors (see below), whose sum is σ = 151151616. Its totient is φ = 13265280.

The previous prime is 51513923. The next prime is 51513929. The reversal of 51513924 is 42931515.

It is a junction number, because it is equal to n+sod(n) for n = 51513891 and 51513900.

It is not an unprimeable number, because it can be changed into a prime (51513923) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181887 + ... + 182169.

It is an arithmetic number, because the mean of its divisors is an integer number (1574496).

Almost surely, 2^51513924 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 51513924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75575808).

51513924 is an abundant number, since it is smaller than the sum of its proper divisors (99637692).

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

51513924 is a wasteful number, since it uses less digits than its factorization.

51513924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 503 counting only the distinct ones).

The product of its digits is 5400, while the sum is 30.

The square root of 51513924 is about 7177.3201126883. The cubic root of 51513924 is about 372.0844703542.

The spelling of 51513924 in words is "fifty-one million, five hundred thirteen thousand, nine hundred twenty-four".