423291231 has 32 divisors (see below), whose sum is σ = 697040640. Its totient is φ = 251690400.

The previous prime is 423291199. The next prime is 423291283. The reversal of 423291231 is 132192324.

It is a happy number.

423291231 is a `hidden beast` number, since 423 + 2 + 9 + 1 + 231 = 666.

It is not a de Polignac number, because 423291231 - 2⁵ = 423291199 is a prime.

It is a super-2 number, since 2×423291231² = 358350932482990722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 423291195 and 423291204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423291131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2296 + ... + 29186.

It is an arithmetic number, because the mean of its divisors is an integer number (21782520).

Almost surely, 2^423291231 is an apocalyptic number.

423291231 is a deficient number, since it is larger than the sum of its proper divisors (273749409).

423291231 is a wasteful number, since it uses less digits than its factorization.

423291231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26964 (or 26958 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 423291231 is about 20574.0426508744. The cubic root of 423291231 is about 750.8383106313.

The spelling of 423291231 in words is "four hundred twenty-three million, two hundred ninety-one thousand, two hundred thirty-one".