231220023 has 8 divisors (see below), whose sum is σ = 310257648. Its totient is φ = 153164544.

The previous prime is 231220021. The next prime is 231220027. The reversal of 231220023 is 320022132.

231220023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 231220023 - 2¹ = 231220021 is a prime.

It is a super-2 number, since 2×231220023² = 106925398072241058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231219984 and 231220011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231220021) 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, 244986 + ... + 245927.

It is an arithmetic number, because the mean of its divisors is an integer number (38782206).

Almost surely, 2^231220023 is an apocalyptic number.

231220023 is a deficient number, since it is larger than the sum of its proper divisors (79037625).

231220023 is a wasteful number, since it uses less digits than its factorization.

231220023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491073.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 231220023 is about 15205.9206561129. The cubic root of 231220023 is about 613.7739895745.

Adding to 231220023 its reverse (320022132), we get a palindrome (551242155).

The spelling of 231220023 in words is "two hundred thirty-one million, two hundred twenty thousand, twenty-three".