2142917491 has 16 divisors (see below), whose sum is σ = 2519203680. Its totient is φ = 1797073920.

The previous prime is 2142917443. The next prime is 2142917531. The reversal of 2142917491 is 1947192412.

It is a cyclic number.

It is not a de Polignac number, because 2142917491 - 2²³ = 2134528883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2142917401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266161 + ... + 274093.

It is an arithmetic number, because the mean of its divisors is an integer number (157450230).

Almost surely, 2^2142917491 is an apocalyptic number.

2142917491 is a deficient number, since it is larger than the sum of its proper divisors (376286189).

2142917491 is a wasteful number, since it uses less digits than its factorization.

2142917491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9846.

The product of its digits is 36288, while the sum is 40.

The square root of 2142917491 is about 46291.6568184808. The cubic root of 2142917491 is about 1289.2440919267.

The spelling of 2142917491 in words is "two billion, one hundred forty-two million, nine hundred seventeen thousand, four hundred ninety-one".