40193431 has 2 divisors, whose sum is σ = 40193432. Its totient is φ = 40193430.

The previous prime is 40193411. The next prime is 40193477. The reversal of 40193431 is 13439104.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40193431 - 2¹⁵ = 40160663 is a prime.

It is a super-2 number, since 2×40193431² = 3231023791103522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40193396 and 40193405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40193401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20096715 + 20096716.

It is an arithmetic number, because the mean of its divisors is an integer number (20096716).

Almost surely, 2^40193431 is an apocalyptic number.

40193431 is a deficient number, since it is larger than the sum of its proper divisors (1).

40193431 is an equidigital number, since it uses as much as digits as its factorization.

40193431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 40193431 is about 6339.8289409100. The cubic root of 40193431 is about 342.5455737037.

The spelling of 40193431 in words is "forty million, one hundred ninety-three thousand, four hundred thirty-one".