140447231 has 2 divisors, whose sum is σ = 140447232. Its totient is φ = 140447230.

The previous prime is 140447213. The next prime is 140447239. The reversal of 140447231 is 132744041.

Together with previous prime (140447213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140447231 - 2²² = 136252927 is a prime.

It is a super-2 number, since 2×140447231² = 39450849391134722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140447231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140447239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70223615 + 70223616.

It is an arithmetic number, because the mean of its divisors is an integer number (70223616).

Almost surely, 2^140447231 is an apocalyptic number.

140447231 is a deficient number, since it is larger than the sum of its proper divisors (1).

140447231 is an equidigital number, since it uses as much as digits as its factorization.

140447231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 140447231 is about 11851.0434561687. The cubic root of 140447231 is about 519.8017377804.

The spelling of 140447231 in words is "one hundred forty million, four hundred forty-seven thousand, two hundred thirty-one".