140212331 has 4 divisors (see below), whose sum is σ = 160242672. Its totient is φ = 120181992.

The previous prime is 140212283. The next prime is 140212337. The reversal of 140212331 is 133212041.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-140212331 is a prime.

It is a super-2 number, since 2×140212331² = 39318995528907122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140212337) 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, 10015160 + ... + 10015173.

It is an arithmetic number, because the mean of its divisors is an integer number (40060668).

Almost surely, 2^140212331 is an apocalyptic number.

140212331 is a deficient number, since it is larger than the sum of its proper divisors (20030341).

140212331 is an equidigital number, since it uses as much as digits as its factorization.

140212331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20030340.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 140212331 is about 11841.1287890978. The cubic root of 140212331 is about 519.5117841260.

Adding to 140212331 its reverse (133212041), we get a palindrome (273424372).

The spelling of 140212331 in words is "one hundred forty million, two hundred twelve thousand, three hundred thirty-one".