221431467506159 has 2 divisors, whose sum is σ = 221431467506160. Its totient is φ = 221431467506158.

The previous prime is 221431467506099. The next prime is 221431467506201. The reversal of 221431467506159 is 951605764134122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221431467506159 - 2²⁸ = 221431199070703 is a prime.

It is a super-2 number, since 2×221431467506159² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221431467506759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110715733753079 + 110715733753080.

It is an arithmetic number, because the mean of its divisors is an integer number (110715733753080).

Almost surely, 2^{221431467506159} is an apocalyptic number.

221431467506159 is a deficient number, since it is larger than the sum of its proper divisors (1).

221431467506159 is an equidigital number, since it uses as much as digits as its factorization.

221431467506159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10886400, while the sum is 56.

The spelling of 221431467506159 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, four hundred sixty-seven million, five hundred six thousand, one hundred fifty-nine".