2140431 has 4 divisors (see below), whose sum is σ = 2853912. Its totient is φ = 1426952.

The previous prime is 2140421. The next prime is 2140441. The reversal of 2140431 is 1340412.

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

It is an interprime number because it is at equal distance from previous prime (2140421) and next prime (2140441).

It is a cyclic number.

It is not a de Polignac number, because 2140431 - 2⁵ = 2140399 is a prime.

It is a super-2 number, since 2×2140431² = 9162889731522, which contains 22 as substring.

It is a D-number.

2140431 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2140431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2140421) 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, 356736 + ... + 356741.

It is an arithmetic number, because the mean of its divisors is an integer number (713478).

2^2140431 is an apocalyptic number.

2140431 is a deficient number, since it is larger than the sum of its proper divisors (713481).

2140431 is an equidigital number, since it uses as much as digits as its factorization.

2140431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713480.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2140431 is about 1463.0211891835. The cubic root of 2140431 is about 128.8745249495.

Adding to 2140431 its reverse (1340412), we get a palindrome (3480843).

The spelling of 2140431 in words is "two million, one hundred forty thousand, four hundred thirty-one".