40142231 has 8 divisors (see below), whose sum is σ = 42527280. Its totient is φ = 37784448.

The previous prime is 40142213. The next prime is 40142251. The reversal of 40142231 is 13224104.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40142231 is a prime.

It is a super-2 number, since 2×40142231² = 3222797419314722, 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 (40142251) 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, 3746 + ... + 9711.

It is an arithmetic number, because the mean of its divisors is an integer number (5315910).

Almost surely, 2^40142231 is an apocalyptic number.

40142231 is a deficient number, since it is larger than the sum of its proper divisors (2385049).

40142231 is a wasteful number, since it uses less digits than its factorization.

40142231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13633.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 40142231 is about 6335.7896903227. The cubic root of 40142231 is about 342.4000624827.

Adding to 40142231 its reverse (13224104), we get a palindrome (53366335).

The spelling of 40142231 in words is "forty million, one hundred forty-two thousand, two hundred thirty-one".