40430531 has 2 divisors, whose sum is σ = 40430532. Its totient is φ = 40430530.

The previous prime is 40430521. The next prime is 40430543. The reversal of 40430531 is 13503404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40430531 - 2¹⁰ = 40429507 is a prime.

It is a super-2 number, since 2×40430531² = 3269255673883922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40430501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20215265 + 20215266.

It is an arithmetic number, because the mean of its divisors is an integer number (20215266).

Almost surely, 2^40430531 is an apocalyptic number.

40430531 is a deficient number, since it is larger than the sum of its proper divisors (1).

40430531 is an equidigital number, since it uses as much as digits as its factorization.

40430531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 40430531 is about 6358.5006880553. The cubic root of 40430531 is about 343.2178093962.

Adding to 40430531 its reverse (13503404), we get a palindrome (53933935).

The spelling of 40430531 in words is "forty million, four hundred thirty thousand, five hundred thirty-one".