2642231491 has 2 divisors, whose sum is σ = 2642231492. Its totient is φ = 2642231490.

The previous prime is 2642231489. The next prime is 2642231503. The reversal of 2642231491 is 1941322462.

2642231491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2642231491 - 2¹ = 2642231489 is a prime.

Together with 2642231489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2642231461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1321115745 + 1321115746.

It is an arithmetic number, because the mean of its divisors is an integer number (1321115746).

Almost surely, 2^2642231491 is an apocalyptic number.

2642231491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2642231491 is an equidigital number, since it uses as much as digits as its factorization.

2642231491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 34.

The square root of 2642231491 is about 51402.6408951914. The cubic root of 2642231491 is about 1382.4739440953.

The spelling of 2642231491 in words is "two billion, six hundred forty-two million, two hundred thirty-one thousand, four hundred ninety-one".