140020231 has 8 divisors (see below), whose sum is σ = 150885504. Its totient is φ = 129168480.

The previous prime is 140020219. The next prime is 140020241. The reversal of 140020231 is 132020041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 140020231 - 2⁷ = 140020103 is a prime.

It is a super-2 number, since 2×140020231² = 39211330178586722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140020241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31605 + ... + 35761.

It is an arithmetic number, because the mean of its divisors is an integer number (18860688).

Almost surely, 2^140020231 is an apocalyptic number.

140020231 is a deficient number, since it is larger than the sum of its proper divisors (10865273).

140020231 is a wasteful number, since it uses less digits than its factorization.

140020231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6761.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 140020231 is about 11833.0144511025. The cubic root of 140020231 is about 519.2744207300.

Adding to 140020231 its reverse (132020041), we get a palindrome (272040272).

The spelling of 140020231 in words is "one hundred forty million, twenty thousand, two hundred thirty-one".