231622031 has 8 divisors (see below), whose sum is σ = 236340720. Its totient is φ = 226916352.

The previous prime is 231622019. The next prime is 231622033. The reversal of 231622031 is 130226132.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231622031 is a prime.

It is a super-2 number, since 2×231622031² = 107297530489129922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231621994 and 231622012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231622033) 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, 37916 + ... + 43598.

It is an arithmetic number, because the mean of its divisors is an integer number (29542590).

Almost surely, 2^231622031 is an apocalyptic number.

231622031 is a deficient number, since it is larger than the sum of its proper divisors (4718689).

231622031 is an equidigital number, since it uses as much as digits as its factorization.

231622031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6505.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 231622031 is about 15219.1337138485. The cubic root of 231622031 is about 614.1294939556.

Adding to 231622031 its reverse (130226132), we get a palindrome (361848163).

The spelling of 231622031 in words is "two hundred thirty-one million, six hundred twenty-two thousand, thirty-one".