231420311 has 8 divisors (see below), whose sum is σ = 241025184. Its totient is φ = 221991840.

The previous prime is 231420253. The next prime is 231420401. The reversal of 231420311 is 113024132.

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

It is a cyclic number.

It is not a de Polignac number, because 231420311 - 2²² = 227226007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231420311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231420011) 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, 41420 + ... + 46673.

It is an arithmetic number, because the mean of its divisors is an integer number (30128148).

Almost surely, 2^231420311 is an apocalyptic number.

231420311 is a deficient number, since it is larger than the sum of its proper divisors (9604873).

231420311 is an equidigital number, since it uses as much as digits as its factorization.

231420311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88201.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 231420311 is about 15212.5050862769. The cubic root of 231420311 is about 613.9511600533.

Adding to 231420311 its reverse (113024132), we get a palindrome (344444443).

The spelling of 231420311 in words is "two hundred thirty-one million, four hundred twenty thousand, three hundred eleven".