40432531 has 2 divisors, whose sum is σ = 40432532. Its totient is φ = 40432530.

The previous prime is 40432517. The next prime is 40432543. The reversal of 40432531 is 13523404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40432531 - 2¹³ = 40424339 is a prime.

It is a super-2 number, since 2×40432531² = 3269579126131922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40432501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20216265 + 20216266.

It is an arithmetic number, because the mean of its divisors is an integer number (20216266).

Almost surely, 2^40432531 is an apocalyptic number.

40432531 is a deficient number, since it is larger than the sum of its proper divisors (1).

40432531 is an equidigital number, since it uses as much as digits as its factorization.

40432531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 40432531 is about 6358.6579558897. The cubic root of 40432531 is about 343.2234686862.

Adding to 40432531 its reverse (13523404), we get a palindrome (53955935).

The spelling of 40432531 in words is "forty million, four hundred thirty-two thousand, five hundred thirty-one".