40861231 has 2 divisors, whose sum is σ = 40861232. Its totient is φ = 40861230.

The previous prime is 40861213. The next prime is 40861237. The reversal of 40861231 is 13216804.

Together with previous prime (40861213) 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 40861231 - 2⁵ = 40861199 is a prime.

It is a super-2 number, since 2×40861231² = 3339280397670722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40861196 and 40861205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40861237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20430615 + 20430616.

It is an arithmetic number, because the mean of its divisors is an integer number (20430616).

Almost surely, 2^40861231 is an apocalyptic number.

40861231 is a deficient number, since it is larger than the sum of its proper divisors (1).

40861231 is an equidigital number, since it uses as much as digits as its factorization.

40861231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 40861231 is about 6392.2790145612. The cubic root of 40861231 is about 344.4322553169.

The spelling of 40861231 in words is "forty million, eight hundred sixty-one thousand, two hundred thirty-one".