231212413 has 4 divisors (see below), whose sum is σ = 231448608. Its totient is φ = 230976220.

The previous prime is 231212383. The next prime is 231212431. The reversal of 231212413 is 314212132.

It is a happy number.

231212413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 231212413 - 2¹³ = 231204221 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 (231212213) 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, 116623 + ... + 118588.

It is an arithmetic number, because the mean of its divisors is an integer number (57862152).

Almost surely, 2^231212413 is an apocalyptic number.

It is an amenable number.

231212413 is a deficient number, since it is larger than the sum of its proper divisors (236195).

231212413 is an equidigital number, since it uses as much as digits as its factorization.

231212413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236194.

The product of its digits is 288, while the sum is 19.

The square root of 231212413 is about 15205.6704225759. The cubic root of 231212413 is about 613.7672559141.

Adding to 231212413 its reverse (314212132), we get a palindrome (545424545).

The spelling of 231212413 in words is "two hundred thirty-one million, two hundred twelve thousand, four hundred thirteen".