51545880 has 96 divisors (see below), whose sum is σ = 168957360. Its totient is φ = 13628160.

The previous prime is 51545873. The next prime is 51545899. The reversal of 51545880 is 8854515.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46614 + ... + 47706.

Almost surely, 2^51545880 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 51545880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84478680).

51545880 is an abundant number, since it is smaller than the sum of its proper divisors (117411480).

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

51545880 is a wasteful number, since it uses less digits than its factorization.

51545880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241 (or 1234 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 36.

The square root of 51545880 is about 7179.5459466459. The cubic root of 51545880 is about 372.1613937216.

It can be divided in two parts, 51545 and 880, that added together give a palindrome (52425).

The spelling of 51545880 in words is "fifty-one million, five hundred forty-five thousand, eight hundred eighty".