231646413 has 4 divisors (see below), whose sum is σ = 308861888. Its totient is φ = 154430940.

The previous prime is 231646397. The next prime is 231646417. The reversal of 231646413 is 314646132.

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 not a de Polignac number, because 231646413 - 2⁴ = 231646397 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 (231646417) 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, 38607733 + ... + 38607738.

It is an arithmetic number, because the mean of its divisors is an integer number (77215472).

Almost surely, 2^231646413 is an apocalyptic number.

It is an amenable number.

231646413 is a deficient number, since it is larger than the sum of its proper divisors (77215475).

231646413 is an equidigital number, since it uses as much as digits as its factorization.

231646413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77215474.

The product of its digits is 10368, while the sum is 30.

The square root of 231646413 is about 15219.9347239073. The cubic root of 231646413 is about 614.1510422512.

The spelling of 231646413 in words is "two hundred thirty-one million, six hundred forty-six thousand, four hundred thirteen".