2142199639 has 4 divisors (see below), whose sum is σ = 2158552440. Its totient is φ = 2125846840.

The previous prime is 2142199613. The next prime is 2142199649. The reversal of 2142199639 is 9369912412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2142199639 is a prime.

It is a super-4 number, since 4×2142199639⁴ (a number of 38 digits) contains 4444 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 (2142199649) 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, 8176204 + ... + 8176465.

It is an arithmetic number, because the mean of its divisors is an integer number (539638110).

Almost surely, 2^2142199639 is an apocalyptic number.

2142199639 is a deficient number, since it is larger than the sum of its proper divisors (16352801).

2142199639 is a wasteful number, since it uses less digits than its factorization.

2142199639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16352800.

The product of its digits is 209952, while the sum is 46.

The square root of 2142199639 is about 46283.9025904255. The cubic root of 2142199639 is about 1289.1001153441.

The spelling of 2142199639 in words is "two billion, one hundred forty-two million, one hundred ninety-nine thousand, six hundred thirty-nine".