221431353632231 has 2 divisors, whose sum is σ = 221431353632232. Its totient is φ = 221431353632230.

The previous prime is 221431353632219. The next prime is 221431353632369. The reversal of 221431353632231 is 132236353134122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221431353632231 is a prime.

It is a super-3 number, since 3×221431353632231³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221431353032231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110715676816115 + 110715676816116.

It is an arithmetic number, because the mean of its divisors is an integer number (110715676816116).

Almost surely, 2^{221431353632231} is an apocalyptic number.

221431353632231 is a deficient number, since it is larger than the sum of its proper divisors (1).

221431353632231 is an equidigital number, since it uses as much as digits as its factorization.

221431353632231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 41.

The spelling of 221431353632231 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, three hundred fifty-three million, six hundred thirty-two thousand, two hundred thirty-one".