54731820 has 96 divisors (see below), whose sum is σ = 180069120. Its totient is φ = 12245760.

The previous prime is 54731801. The next prime is 54731821. The reversal of 54731820 is 2813745.

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

It is not an unprimeable number, because it can be changed into a prime (54731821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5391 + ... + 11769.

It is an arithmetic number, because the mean of its divisors is an integer number (1875720).

Almost surely, 2^54731820 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 54731820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90034560).

54731820 is an abundant number, since it is smaller than the sum of its proper divisors (125337300).

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

54731820 is a wasteful number, since it uses less digits than its factorization.

54731820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6415 (or 6413 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 54731820 is about 7398.0957009220. The cubic root of 54731820 is about 379.6761321767.

The spelling of 54731820 in words is "fifty-four million, seven hundred thirty-one thousand, eight hundred twenty".