231311020203 has 48 divisors (see below), whose sum is σ = 353683998720. Its totient is φ = 145476777600.

The previous prime is 231311020181. The next prime is 231311020231. The reversal of 231311020203 is 302020113132.

It is not a de Polignac number, because 231311020203 - 2¹³ = 231311012011 is a prime.

It is a super-2 number, since 2×231311020203² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231311020403) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1697400 + ... + 1828602.

It is an arithmetic number, because the mean of its divisors is an integer number (7368416640).

Almost surely, 2^231311020203 is an apocalyptic number.

231311020203 is a deficient number, since it is larger than the sum of its proper divisors (122372978517).

231311020203 is a wasteful number, since it uses less digits than its factorization.

231311020203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131400 (or 131397 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 231311020203 its reverse (302020113132), we get a palindrome (533331133335).

The spelling of 231311020203 in words is "two hundred thirty-one billion, three hundred eleven million, twenty thousand, two hundred three".