2155615426231 has 2 divisors, whose sum is σ = 2155615426232. Its totient is φ = 2155615426230.

The previous prime is 2155615426207. The next prime is 2155615426303. The reversal of 2155615426231 is 1326245165512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2155615426231 - 2²⁵ = 2155581871799 is a prime.

It is a super-2 number, since 2×2155615426231² (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 (2155615424231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077807713115 + 1077807713116.

It is an arithmetic number, because the mean of its divisors is an integer number (1077807713116).

Almost surely, 2^{2155615426231} is an apocalyptic number.

2155615426231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155615426231 is an equidigital number, since it uses as much as digits as its factorization.

2155615426231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432000, while the sum is 43.

The spelling of 2155615426231 in words is "two trillion, one hundred fifty-five billion, six hundred fifteen million, four hundred twenty-six thousand, two hundred thirty-one".