231864273 has 6 divisors (see below), whose sum is σ = 334915074. Its totient is φ = 154576176.

The previous prime is 231864271. The next prime is 231864293. The reversal of 231864273 is 372468132.

It is a happy number.

231864273 is a `hidden beast` number, since 2 + 3 + 1 + 8 + 642 + 7 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 216442944 + 15421329 = 14712^2 + 3927^2 .

It is not a de Polignac number, because 231864273 - 2¹ = 231864271 is a prime.

It is a super-2 number, since 2×231864273² = 107522082187637058, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231864271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12881340 + ... + 12881357.

It is an arithmetic number, because the mean of its divisors is an integer number (55819179).

Almost surely, 2^231864273 is an apocalyptic number.

It is an amenable number.

231864273 is a deficient number, since it is larger than the sum of its proper divisors (103050801).

231864273 is a wasteful number, since it uses less digits than its factorization.

231864273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25762703 (or 25762700 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 231864273 is about 15227.0901028397. The cubic root of 231864273 is about 614.3435152260.

The spelling of 231864273 in words is "two hundred thirty-one million, eight hundred sixty-four thousand, two hundred seventy-three".