51573456 has 80 divisors (see below), whose sum is σ = 161507520. Its totient is φ = 15626880.

The previous prime is 51573443. The next prime is 51573463. The reversal of 51573456 is 65437515.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51573456.

It is a congruent number.

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, 675 + ... + 10178.

It is an arithmetic number, because the mean of its divisors is an integer number (2018844).

Almost surely, 2^51573456 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 51573456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80753760).

51573456 is an abundant number, since it is smaller than the sum of its proper divisors (109934064).

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

51573456 is a wasteful number, since it uses less digits than its factorization.

51573456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10881 (or 10869 counting only the distinct ones).

The product of its digits is 63000, while the sum is 36.

The square root of 51573456 is about 7181.4661455722. The cubic root of 51573456 is about 372.2277481552.

The spelling of 51573456 in words is "fifty-one million, five hundred seventy-three thousand, four hundred fifty-six".