40431199 has 2 divisors, whose sum is σ = 40431200. Its totient is φ = 40431198.

The previous prime is 40431119. The next prime is 40431241. The reversal of 40431199 is 99113404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40431199 - 2²⁵ = 6876767 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40431199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40431109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20215599 + 20215600.

It is an arithmetic number, because the mean of its divisors is an integer number (20215600).

Almost surely, 2^40431199 is an apocalyptic number.

40431199 is a deficient number, since it is larger than the sum of its proper divisors (1).

40431199 is an equidigital number, since it uses as much as digits as its factorization.

40431199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 40431199 is about 6358.5532159446. The cubic root of 40431199 is about 343.2196996198.

The spelling of 40431199 in words is "forty million, four hundred thirty-one thousand, one hundred ninety-nine".