140220431 has 4 divisors (see below), whose sum is σ = 151006632. Its totient is φ = 129434232.

The previous prime is 140220427. The next prime is 140220433. The reversal of 140220431 is 134022041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134022041 = 383 ⋅349927.

It is a cyclic number.

It is not a de Polignac number, because 140220431 - 2² = 140220427 is a prime.

It is a super-2 number, since 2×140220431² = 39323538539651522, 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 (140220433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5393081 + ... + 5393106.

It is an arithmetic number, because the mean of its divisors is an integer number (37751658).

Almost surely, 2^140220431 is an apocalyptic number.

140220431 is a deficient number, since it is larger than the sum of its proper divisors (10786201).

140220431 is a wasteful number, since it uses less digits than its factorization.

140220431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10786200.

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

The square root of 140220431 is about 11841.4708123611. The cubic root of 140220431 is about 519.5217879166.

Adding to 140220431 its reverse (134022041), we get a palindrome (274242472).

The spelling of 140220431 in words is "one hundred forty million, two hundred twenty thousand, four hundred thirty-one".