2181304072231 has 2 divisors, whose sum is σ = 2181304072232. Its totient is φ = 2181304072230.

The previous prime is 2181304072153. The next prime is 2181304072249. The reversal of 2181304072231 is 1322704031812.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2181304072231 is a prime.

It is a super-2 number, since 2×2181304072231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2181304072271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1090652036115 + 1090652036116.

It is an arithmetic number, because the mean of its divisors is an integer number (1090652036116).

Almost surely, 2^{2181304072231} is an apocalyptic number.

2181304072231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2181304072231 is an equidigital number, since it uses as much as digits as its factorization.

2181304072231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 34.

The spelling of 2181304072231 in words is "two trillion, one hundred eighty-one billion, three hundred four million, seventy-two thousand, two hundred thirty-one".