231461153021 has 4 divisors (see below), whose sum is σ = 264527032032. Its totient is φ = 198395274012.

The previous prime is 231461152999. The next prime is 231461153023. The reversal of 231461153021 is 120351164132.

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 231461153021 - 2¹⁰ = 231461151997 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 (231461153023) 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, 16532939495 + ... + 16532939508.

It is an arithmetic number, because the mean of its divisors is an integer number (66131758008).

Almost surely, 2^231461153021 is an apocalyptic number.

It is an amenable number.

231461153021 is a deficient number, since it is larger than the sum of its proper divisors (33065879011).

231461153021 is an equidigital number, since it uses as much as digits as its factorization.

231461153021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33065879010.

The product of its (nonzero) digits is 4320, while the sum is 29.

It can be divided in two parts, 2314611 and 53021, that added together give a palindrome (2367632).

The spelling of 231461153021 in words is "two hundred thirty-one billion, four hundred sixty-one million, one hundred fifty-three thousand, twenty-one".