231215141 has 4 divisors (see below), whose sum is σ = 231495552. Its totient is φ = 230934732.

The previous prime is 231215129. The next prime is 231215189. The reversal of 231215141 is 141512132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231215141 - 2⁶ = 231215077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231212141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138965 + ... + 140618.

It is an arithmetic number, because the mean of its divisors is an integer number (57873888).

Almost surely, 2^231215141 is an apocalyptic number.

It is an amenable number.

231215141 is a deficient number, since it is larger than the sum of its proper divisors (280411).

231215141 is an equidigital number, since it uses as much as digits as its factorization.

231215141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280410.

The product of its digits is 240, while the sum is 20.

The square root of 231215141 is about 15205.7601256892. The cubic root of 231215141 is about 613.7696697847.

Adding to 231215141 its reverse (141512132), we get a palindrome (372727273).

The spelling of 231215141 in words is "two hundred thirty-one million, two hundred fifteen thousand, one hundred forty-one".