2142431399 has 4 divisors (see below), whose sum is σ = 2146184040. Its totient is φ = 2138678760.

The previous prime is 2142431383. The next prime is 2142431411. The reversal of 2142431399 is 9931342412.

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 2142431399 - 2⁴ = 2142431383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142431309) 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, 1875464 + ... + 1876605.

It is an arithmetic number, because the mean of its divisors is an integer number (536546010).

Almost surely, 2^2142431399 is an apocalyptic number.

2142431399 is a deficient number, since it is larger than the sum of its proper divisors (3752641).

2142431399 is an equidigital number, since it uses as much as digits as its factorization.

2142431399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3752640.

The product of its digits is 46656, while the sum is 38.

The square root of 2142431399 is about 46286.4062009571. The cubic root of 2142431399 is about 1289.1466019963.

The spelling of 2142431399 in words is "two billion, one hundred forty-two million, four hundred thirty-one thousand, three hundred ninety-nine".