2135250991 has 2 divisors, whose sum is σ = 2135250992. Its totient is φ = 2135250990.

The previous prime is 2135250979. The next prime is 2135251007. The reversal of 2135250991 is 1990525312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2135250991 - 2⁵ = 2135250959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2135250991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2135250961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067625495 + 1067625496.

It is an arithmetic number, because the mean of its divisors is an integer number (1067625496).

Almost surely, 2^2135250991 is an apocalyptic number.

2135250991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2135250991 is an equidigital number, since it uses as much as digits as its factorization.

2135250991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 2135250991 is about 46208.7761253206. The cubic root of 2135250991 is about 1287.7047885641.

The spelling of 2135250991 in words is "two billion, one hundred thirty-five million, two hundred fifty thousand, nine hundred ninety-one".