140420231 has 24 divisors (see below), whose sum is σ = 167935680. Its totient is φ = 117028800.

The previous prime is 140420227. The next prime is 140420237. The reversal of 140420231 is 132024041.

It is not a de Polignac number, because 140420231 - 2² = 140420227 is a prime.

It is a super-2 number, since 2×140420231² = 39435682548186722, 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 (140420237) 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 23 ways as a sum of consecutive naturals, for example, 325586 + ... + 326016.

It is an arithmetic number, because the mean of its divisors is an integer number (6997320).

Almost surely, 2^140420231 is an apocalyptic number.

140420231 is a deficient number, since it is larger than the sum of its proper divisors (27515449).

140420231 is a wasteful number, since it uses less digits than its factorization.

140420231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615 (or 608 counting only the distinct ones).

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

The square root of 140420231 is about 11849.9042612166. The cubic root of 140420231 is about 519.7684262268.

Adding to 140420231 its reverse (132024041), we get a palindrome (272444272).

The spelling of 140420231 in words is "one hundred forty million, four hundred twenty thousand, two hundred thirty-one".