231545400 has 144 divisors (see below), whose sum is σ = 758266200. Its totient is φ = 58440960.

The previous prime is 231545399. The next prime is 231545401. The reversal of 231545400 is 4545132.

231545400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (231545399) and next prime (231545401).

It is a super-2 number, since 2×231545400² = 107226544522320000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231545401) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 216066 + ... + 217134.

Almost surely, 2^231545400 is an apocalyptic number.

231545400 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 231545400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (379133100).

231545400 is an abundant number, since it is smaller than the sum of its proper divisors (526720800).

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

231545400 is a wasteful number, since it uses less digits than its factorization.

231545400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126 (or 1098 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 231545400 is about 15216.6159181337. The cubic root of 231545400 is about 614.0617592530.

The spelling of 231545400 in words is "two hundred thirty-one million, five hundred forty-five thousand, four hundred".