40186231 has 2 divisors, whose sum is σ = 40186232. Its totient is φ = 40186230.

The previous prime is 40186219. The next prime is 40186253. The reversal of 40186231 is 13268104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40186231 - 2⁷ = 40186103 is a prime.

It is a super-2 number, since 2×40186231² = 3229866323970722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40186196 and 40186205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40186271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20093115 + 20093116.

It is an arithmetic number, because the mean of its divisors is an integer number (20093116).

Almost surely, 2^40186231 is an apocalyptic number.

40186231 is a deficient number, since it is larger than the sum of its proper divisors (1).

40186231 is an equidigital number, since it uses as much as digits as its factorization.

40186231 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 40186231 is about 6339.2610768133. The cubic root of 40186231 is about 342.5251186579.

The spelling of 40186231 in words is "forty million, one hundred eighty-six thousand, two hundred thirty-one".