231352207424621 has 4 divisors (see below), whose sum is σ = 234805225445952. Its totient is φ = 227899189403292.

The previous prime is 231352207424551. The next prime is 231352207424633. The reversal of 231352207424621 is 126424702253132.

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 a de Polignac number, because none of the positive numbers 2^k-231352207424621 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 (231352207424641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1726509010565 + ... + 1726509010698.

It is an arithmetic number, because the mean of its divisors is an integer number (58701306361488).

Almost surely, 2^{231352207424621} is an apocalyptic number.

It is an amenable number.

231352207424621 is a deficient number, since it is larger than the sum of its proper divisors (3453018021331).

231352207424621 is an equidigital number, since it uses as much as digits as its factorization.

231352207424621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3453018021330.

The product of its (nonzero) digits is 967680, while the sum is 44.

Adding to 231352207424621 its reverse (126424702253132), we get a palindrome (357776909677753).

The spelling of 231352207424621 in words is "two hundred thirty-one trillion, three hundred fifty-two billion, two hundred seven million, four hundred twenty-four thousand, six hundred twenty-one".