2135531989 has 2 divisors, whose sum is σ = 2135531990. Its totient is φ = 2135531988.

The previous prime is 2135531977. The next prime is 2135532019. The reversal of 2135531989 is 9891355312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1097596900 + 1037935089 = 33130^2 + 32217^2 .

It is a cyclic number.

It is not a de Polignac number, because 2135531989 - 2²⁷ = 2001314261 is a prime.

It is a super-2 number, since 2×2135531989² = 9120993752084592242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2135531389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067765994 + 1067765995.

It is an arithmetic number, because the mean of its divisors is an integer number (1067765995).

Almost surely, 2^2135531989 is an apocalyptic number.

It is an amenable number.

2135531989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2135531989 is an equidigital number, since it uses as much as digits as its factorization.

2135531989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 291600, while the sum is 46.

The square root of 2135531989 is about 46211.8165516137. The cubic root of 2135531989 is about 1287.7612731960.

The spelling of 2135531989 in words is "two billion, one hundred thirty-five million, five hundred thirty-one thousand, nine hundred eighty-nine".