231545404 has 12 divisors (see below), whose sum is σ = 407925000. Its totient is φ = 114995408.

The previous prime is 231545401. The next prime is 231545407. The reversal of 231545404 is 404545132.

It is an interprime number because it is at equal distance from previous prime (231545401) and next prime (231545407).

It is a super-2 number, since 2×231545404² = 107226548227046432, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 193654 + ... + 194845.

It is an arithmetic number, because the mean of its divisors is an integer number (33993750).

Almost surely, 2^231545404 is an apocalyptic number.

It is an amenable number.

231545404 is a deficient number, since it is larger than the sum of its proper divisors (176379596).

231545404 is a wasteful number, since it uses less digits than its factorization.

231545404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388652 (or 388650 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 231545404 is about 15216.6160495690. The cubic root of 231545404 is about 614.0617627890.

The spelling of 231545404 in words is "two hundred thirty-one million, five hundred forty-five thousand, four hundred four".