140202431 has 4 divisors (see below), whose sum is σ = 140346912. Its totient is φ = 140057952.

The previous prime is 140202427. The next prime is 140202479. The reversal of 140202431 is 134202041.

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 140202431 - 2² = 140202427 is a prime.

It is a super-2 number, since 2×140202431² = 39313443316619522, 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 (140202631) 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, 70775 + ... + 72728.

It is an arithmetic number, because the mean of its divisors is an integer number (35086728).

Almost surely, 2^140202431 is an apocalyptic number.

140202431 is a deficient number, since it is larger than the sum of its proper divisors (144481).

140202431 is an equidigital number, since it uses as much as digits as its factorization.

140202431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144480.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 140202431 is about 11840.7107472482. The cubic root of 140202431 is about 519.4995567475.

Adding to 140202431 its reverse (134202041), we get a palindrome (274404472).

The spelling of 140202431 in words is "one hundred forty million, two hundred two thousand, four hundred thirty-one".