55497231000 has 640 divisors, whose sum is σ = 210628978560. Its totient is φ = 13575168000.

The previous prime is 55497230941. The next prime is 55497231071. The reversal of 55497231000 is 13279455.

55497231000 is a `hidden beast` number, since 5 + 549 + 7 + 2 + 3 + 100 + 0 = 666.

55497231000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55497231000² (a number of 22 digits) contains 22 as substring.

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 159 ways as a sum of consecutive naturals, for example, 56456509 + ... + 56457491.

It is an arithmetic number, because the mean of its divisors is an integer number (329107779).

Almost surely, 2^55497231000 is an apocalyptic number.

55497231000 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 55497231000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105314489280).

55497231000 is an abundant number, since it is smaller than the sum of its proper divisors (155131747560).

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

55497231000 is a wasteful number, since it uses less digits than its factorization.

55497231000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074 (or 1051 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The spelling of 55497231000 in words is "fifty-five billion, four hundred ninety-seven million, two hundred thirty-one thousand".