2135987331 has 4 divisors (see below), whose sum is σ = 2847983112. Its totient is φ = 1423991552.

The previous prime is 2135987311. The next prime is 2135987339. The reversal of 2135987331 is 1337895312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2135987331 - 2¹⁵ = 2135954563 is a prime.

It is a super-2 number, since 2×2135987331² = 9124883756385007122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2135987339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355997886 + ... + 355997891.

It is an arithmetic number, because the mean of its divisors is an integer number (711995778).

Almost surely, 2^2135987331 is an apocalyptic number.

2135987331 is a deficient number, since it is larger than the sum of its proper divisors (711995781).

2135987331 is an equidigital number, since it uses as much as digits as its factorization.

2135987331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711995780.

The product of its digits is 136080, while the sum is 42.

The square root of 2135987331 is about 46216.7429726501. The cubic root of 2135987331 is about 1287.8527929556.

The spelling of 2135987331 in words is "two billion, one hundred thirty-five million, nine hundred eighty-seven thousand, three hundred thirty-one".