231240022 has 16 divisors (see below), whose sum is σ = 389783520. Its totient is φ = 102085632.

The previous prime is 231240019. The next prime is 231240029. The reversal of 231240022 is 220042132.

231240022 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 231239978 and 231240005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231240029) 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, 192747 + ... + 193942.

It is an arithmetic number, because the mean of its divisors is an integer number (24361470).

Almost surely, 2^231240022 is an apocalyptic number.

231240022 is a deficient number, since it is larger than the sum of its proper divisors (158543498).

231240022 is a wasteful number, since it uses less digits than its factorization.

231240022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386727.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 231240022 is about 15206.5782475875. The cubic root of 231240022 is about 613.7916848588.

Adding to 231240022 its reverse (220042132), we get a palindrome (451282154).

The spelling of 231240022 in words is "two hundred thirty-one million, two hundred forty thousand, twenty-two".