2231977475591 has 2 divisors, whose sum is σ = 2231977475592. Its totient is φ = 2231977475590.

The previous prime is 2231977475537. The next prime is 2231977475641. The reversal of 2231977475591 is 1955747791322.

2231977475591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2231977475591 - 2²² = 2231973281287 is a prime.

It is a super-3 number, since 3×2231977475591³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2231977475191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115988737795 + 1115988737796.

It is an arithmetic number, because the mean of its divisors is an integer number (1115988737796).

Almost surely, 2^{2231977475591} is an apocalyptic number.

2231977475591 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231977475591 is an equidigital number, since it uses as much as digits as its factorization.

2231977475591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33339600, while the sum is 62.

The spelling of 2231977475591 in words is "two trillion, two hundred thirty-one billion, nine hundred seventy-seven million, four hundred seventy-five thousand, five hundred ninety-one".