51413520 has 160 divisors (see below), whose sum is σ = 168739200. Its totient is φ = 12931072.

The previous prime is 51413519. The next prime is 51413539. The reversal of 51413520 is 2531415.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 577636 + ... + 577724.

It is an arithmetic number, because the mean of its divisors is an integer number (1054620).

Almost surely, 2^51413520 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 51413520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84369600).

51413520 is an abundant number, since it is smaller than the sum of its proper divisors (117325680).

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

51413520 is a wasteful number, since it uses less digits than its factorization.

51413520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 51413520 is about 7170.3221684942. The cubic root of 51413520 is about 371.8425741564.

Adding to 51413520 its reverse (2531415), we get a palindrome (53944935).

The spelling of 51413520 in words is "fifty-one million, four hundred thirteen thousand, five hundred twenty".