51813552 has 160 divisors (see below), whose sum is σ = 166275072. Its totient is φ = 13565952.

The previous prime is 51813529. The next prime is 51813563. The reversal of 51813552 is 25531815.

It is a congruent number.

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, 268368 + ... + 268560.

Almost surely, 2^51813552 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 51813552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83137536).

51813552 is an abundant number, since it is smaller than the sum of its proper divisors (114461520).

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

51813552 is a wasteful number, since it uses less digits than its factorization.

51813552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 269 counting only the distinct ones).

The product of its digits is 6000, while the sum is 30.

The square root of 51813552 is about 7198.1630990135. The cubic root of 51813552 is about 372.8044793680.

The spelling of 51813552 in words is "fifty-one million, eight hundred thirteen thousand, five hundred fifty-two".