140502631 has 4 divisors (see below), whose sum is σ = 141433264. Its totient is φ = 139572000.

The previous prime is 140502617. The next prime is 140502641. The reversal of 140502631 is 136205041.

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 140502631 - 2²³ = 132114023 is a prime.

It is a super-2 number, since 2×140502631² = 39481978635844322, 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 (140502641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 465090 + ... + 465391.

It is an arithmetic number, because the mean of its divisors is an integer number (35358316).

Almost surely, 2^140502631 is an apocalyptic number.

140502631 is a deficient number, since it is larger than the sum of its proper divisors (930633).

140502631 is an equidigital number, since it uses as much as digits as its factorization.

140502631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930632.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 140502631 is about 11853.3805726468. The cubic root of 140502631 is about 519.8700747886.

Adding to 140502631 its reverse (136205041), we get a palindrome (276707672).

The spelling of 140502631 in words is "one hundred forty million, five hundred two thousand, six hundred thirty-one".