2142140431 has 4 divisors (see below), whose sum is σ = 2142551952. Its totient is φ = 2141728912.

The previous prime is 2142140423. The next prime is 2142140513. The reversal of 2142140431 is 1340412412.

It is a happy number.

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 2142140431 - 2³ = 2142140423 is a prime.

It is a super-2 number, since 2×2142140431² = 9177531252249731522, 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 (2142149431) 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, 197851 + ... + 208396.

It is an arithmetic number, because the mean of its divisors is an integer number (535637988).

Almost surely, 2^2142140431 is an apocalyptic number.

2142140431 is a deficient number, since it is larger than the sum of its proper divisors (411521).

2142140431 is an equidigital number, since it uses as much as digits as its factorization.

2142140431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411520.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 2142140431 is about 46283.2629683777. The cubic root of 2142140431 is about 1289.0882388066.

Adding to 2142140431 its reverse (1340412412), we get a palindrome (3482552843).

The spelling of 2142140431 in words is "two billion, one hundred forty-two million, one hundred forty thousand, four hundred thirty-one".