231543772 has 24 divisors (see below), whose sum is σ = 424242000. Its totient is φ = 110428416.

The previous prime is 231543751. The next prime is 231543773. The reversal of 231543772 is 277345132.

It is a super-2 number, since 2×231543772² = 107225036703975968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231543773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2397 + ... + 21652.

It is an arithmetic number, because the mean of its divisors is an integer number (17676750).

Almost surely, 2^231543772 is an apocalyptic number.

It is an amenable number.

231543772 is a deficient number, since it is larger than the sum of its proper divisors (192698228).

231543772 is a wasteful number, since it uses less digits than its factorization.

231543772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24165 (or 24163 counting only the distinct ones).

The product of its digits is 35280, while the sum is 34.

The square root of 231543772 is about 15216.5624238854. The cubic root of 231543772 is about 614.0603200897.

The spelling of 231543772 in words is "two hundred thirty-one million, five hundred forty-three thousand, seven hundred seventy-two".