51582900 has 72 divisors (see below), whose sum is σ = 150441760. Its totient is φ = 13645440.

The previous prime is 51582899. The next prime is 51582907. The reversal of 51582900 is 928515.

51582900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51582907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41082 + ... + 42318.

Almost surely, 2^51582900 is an apocalyptic number.

51582900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51582900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75220880).

51582900 is an abundant number, since it is smaller than the sum of its proper divisors (98858860).

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

51582900 is a wasteful number, since it uses less digits than its factorization.

51582900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393 (or 1386 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 51582900 is about 7182.1236413752. The cubic root of 51582900 is about 372.2504672345.

The spelling of 51582900 in words is "fifty-one million, five hundred eighty-two thousand, nine hundred".