40907231 has 2 divisors, whose sum is σ = 40907232. Its totient is φ = 40907230.

The previous prime is 40907221. The next prime is 40907257. The reversal of 40907231 is 13270904.

It is an a-pointer prime, because the next prime (40907257) can be obtained adding 40907231 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40907231 is a prime.

It is a super-2 number, since 2×40907231² = 3346803096174722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40907231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40907221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20453615 + 20453616.

It is an arithmetic number, because the mean of its divisors is an integer number (20453616).

Almost surely, 2^40907231 is an apocalyptic number.

40907231 is a deficient number, since it is larger than the sum of its proper divisors (1).

40907231 is an equidigital number, since it uses as much as digits as its factorization.

40907231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 40907231 is about 6395.8760932338. The cubic root of 40907231 is about 344.5614563680.

The spelling of 40907231 in words is "forty million, nine hundred seven thousand, two hundred thirty-one".