40031540309 has 2 divisors, whose sum is σ = 40031540310. Its totient is φ = 40031540308.

The previous prime is 40031540291. The next prime is 40031540387. The reversal of 40031540309 is 90304513004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21995856100 + 18035684209 = 148310^2 + 134297^2 .

It is a cyclic number.

It is not a de Polignac number, because 40031540309 - 2¹⁶ = 40031474773 is a prime.

It is a super-2 number, since 2×40031540309² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40031540009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20015770154 + 20015770155.

It is an arithmetic number, because the mean of its divisors is an integer number (20015770155).

Almost surely, 2^40031540309 is an apocalyptic number.

It is an amenable number.

40031540309 is a deficient number, since it is larger than the sum of its proper divisors (1).

40031540309 is an equidigital number, since it uses as much as digits as its factorization.

40031540309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The spelling of 40031540309 in words is "forty billion, thirty-one million, five hundred forty thousand, three hundred nine".