231021462461 has 4 divisors (see below), whose sum is σ = 231024140832. Its totient is φ = 231018784092.

The previous prime is 231021462437. The next prime is 231021462487. The reversal of 231021462461 is 164264120132.

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-231021462461 is a prime.

It is a super-2 number, since 2×231021462461² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231021462421) 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, 1205345 + ... + 1383798.

It is an arithmetic number, because the mean of its divisors is an integer number (57756035208).

Almost surely, 2^231021462461 is an apocalyptic number.

It is an amenable number.

231021462461 is a deficient number, since it is larger than the sum of its proper divisors (2678371).

231021462461 is an equidigital number, since it uses as much as digits as its factorization.

231021462461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2678370.

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 231021462461 its reverse (164264120132), we get a palindrome (395285582593).

The spelling of 231021462461 in words is "two hundred thirty-one billion, twenty-one million, four hundred sixty-two thousand, four hundred sixty-one".