231623004 has 24 divisors (see below), whose sum is σ = 540700048. Its totient is φ = 77172480.

The previous prime is 231622987. The next prime is 231623009. The reversal of 231623004 is 400326132.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231623009) 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, 47814 + ... + 52434.

Almost surely, 2^231623004 is an apocalyptic number.

It is an amenable number.

231623004 is an abundant number, since it is smaller than the sum of its proper divisors (309077044).

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

231623004 is a wasteful number, since it uses less digits than its factorization.

231623004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8805 (or 8803 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 231623004 is about 15219.1656801547. The cubic root of 231623004 is about 614.1303539014.

Adding to 231623004 its reverse (400326132), we get a palindrome (631949136).

The spelling of 231623004 in words is "two hundred thirty-one million, six hundred twenty-three thousand, four".