231433091936281 has 4 divisors (see below), whose sum is σ = 231435999138100. Its totient is φ = 231430184734464.

The previous prime is 231433091936213. The next prime is 231433091936317. The reversal of 231433091936281 is 182639190334132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 75769016611600 + 155664075324681 = 8704540^2 + 12476541^2 .

It is a cyclic number.

It is not a de Polignac number, because 231433091936281 - 2²¹ = 231433089839129 is a prime.

It is a super-2 number, since 2×231433091936281² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231433091136281) 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, 1453481496 + ... + 1453640713.

It is an arithmetic number, because the mean of its divisors is an integer number (57858999784525).

Almost surely, 2^{231433091936281} is an apocalyptic number.

It is an amenable number.

231433091936281 is a deficient number, since it is larger than the sum of its proper divisors (2907201819).

231433091936281 is an equidigital number, since it uses as much as digits as its factorization.

231433091936281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2907201818.

The product of its (nonzero) digits is 5038848, while the sum is 55.

The spelling of 231433091936281 in words is "two hundred thirty-one trillion, four hundred thirty-three billion, ninety-one million, nine hundred thirty-six thousand, two hundred eighty-one".