231451451321 has 4 divisors (see below), whose sum is σ = 232017347700. Its totient is φ = 230885554944.

The previous prime is 231451451303. The next prime is 231451451339. The reversal of 231451451321 is 123154154132.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (231451451303) and next prime (231451451339).

It can be written as a sum of positive squares in 2 ways, for example, as 225116087296 + 6335364025 = 474464^2 + 79595^2 .

It is a cyclic number.

It is not a de Polignac number, because 231451451321 - 2²² = 231447257017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231453451321) 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, 282947576 + ... + 282948393.

It is an arithmetic number, because the mean of its divisors is an integer number (58004336925).

Almost surely, 2^231451451321 is an apocalyptic number.

It is an amenable number.

231451451321 is a deficient number, since it is larger than the sum of its proper divisors (565896379).

231451451321 is an equidigital number, since it uses as much as digits as its factorization.

231451451321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565896378.

The product of its digits is 14400, while the sum is 32.

The spelling of 231451451321 in words is "two hundred thirty-one billion, four hundred fifty-one million, four hundred fifty-one thousand, three hundred twenty-one".