140240431 has 2 divisors, whose sum is σ = 140240432. Its totient is φ = 140240430.

The previous prime is 140240423. The next prime is 140240437. The reversal of 140240431 is 134042041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140240431 - 2³ = 140240423 is a prime.

It is a super-2 number, since 2×140240431² = 39334756974131522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 140240399 and 140240408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140240437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70120215 + 70120216.

It is an arithmetic number, because the mean of its divisors is an integer number (70120216).

Almost surely, 2^140240431 is an apocalyptic number.

140240431 is a deficient number, since it is larger than the sum of its proper divisors (1).

140240431 is an equidigital number, since it uses as much as digits as its factorization.

140240431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 140240431 is about 11842.3152719390. The cubic root of 140240431 is about 519.5464869844.

Adding to 140240431 its reverse (134042041), we get a palindrome (274282472).

The spelling of 140240431 in words is "one hundred forty million, two hundred forty thousand, four hundred thirty-one".