231541311 has 16 divisors (see below), whose sum is σ = 314536320. Its totient is φ = 151463520.

The previous prime is 231541291. The next prime is 231541313. The reversal of 231541311 is 113145132.

It is not a de Polignac number, because 231541311 - 2⁵ = 231541279 is a prime.

It is a super-2 number, since 2×231541311² = 107222757399197442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231541313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142741 + ... + 144353.

It is an arithmetic number, because the mean of its divisors is an integer number (19658520).

Almost surely, 2^231541311 is an apocalyptic number.

231541311 is a deficient number, since it is larger than the sum of its proper divisors (82995009).

231541311 is a wasteful number, since it uses less digits than its factorization.

231541311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2486.

The product of its digits is 360, while the sum is 21.

The square root of 231541311 is about 15216.4815578372. The cubic root of 231541311 is about 614.0581445359.

Adding to 231541311 its reverse (113145132), we get a palindrome (344686443).

The spelling of 231541311 in words is "two hundred thirty-one million, five hundred forty-one thousand, three hundred eleven".