231553000 has 128 divisors (see below), whose sum is σ = 652204800. Its totient is φ = 75168000.

The previous prime is 231552989. The next prime is 231553031. The reversal of 231553000 is 355132.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132130 + ... + 133870.

It is an arithmetic number, because the mean of its divisors is an integer number (5095350).

Almost surely, 2^231553000 is an apocalyptic number.

231553000 is a gapful number since it is divisible by the number (20) 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 231553000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326102400).

231553000 is an abundant number, since it is smaller than the sum of its proper divisors (420651800).

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

231553000 is a wasteful number, since it uses less digits than its factorization.

231553000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788 (or 1774 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 231553000 is about 15216.8656430948. The cubic root of 231553000 is about 614.0684776162.

The spelling of 231553000 in words is "two hundred thirty-one million, five hundred fifty-three thousand".