2138491213 has 16 divisors (see below), whose sum is σ = 2205216000. Its totient is φ = 2073012480.

The previous prime is 2138491207. The next prime is 2138491219. The reversal of 2138491213 is 3121948312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2138491207) and next prime (2138491219).

It is a cyclic number.

It is not a de Polignac number, because 2138491213 - 2²⁵ = 2104936781 is a prime.

It is a super-2 number, since 2×2138491213² = 9146289336156422738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138491219) 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, 1370928 + ... + 1372486.

It is an arithmetic number, because the mean of its divisors is an integer number (137826000).

Almost surely, 2^2138491213 is an apocalyptic number.

It is an amenable number.

2138491213 is a deficient number, since it is larger than the sum of its proper divisors (66724787).

2138491213 is a wasteful number, since it uses less digits than its factorization.

2138491213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932.

The product of its digits is 10368, while the sum is 34.

The square root of 2138491213 is about 46243.8235119026. The cubic root of 2138491213 is about 1288.3558190722.

The spelling of 2138491213 in words is "two billion, one hundred thirty-eight million, four hundred ninety-one thousand, two hundred thirteen".