51245408 has 48 divisors (see below), whose sum is σ = 104464080. Its totient is φ = 24729600.

The previous prime is 51245401. The next prime is 51245423. The reversal of 51245408 is 80454215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51245401) 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, 182228 + ... + 182508.

It is an arithmetic number, because the mean of its divisors is an integer number (2176335).

Almost surely, 2^51245408 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 51245408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52232040).

51245408 is an abundant number, since it is smaller than the sum of its proper divisors (53218672).

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

51245408 is a wasteful number, since it uses less digits than its factorization.

51245408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471 (or 463 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 51245408 is about 7158.5898052619. The cubic root of 51245408 is about 371.4368478291.

The spelling of 51245408 in words is "fifty-one million, two hundred forty-five thousand, four hundred eight".