40802131 has 2 divisors, whose sum is σ = 40802132. Its totient is φ = 40802130.

The previous prime is 40802123. The next prime is 40802143. The reversal of 40802131 is 13120804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40802131 - 2³ = 40802123 is a prime.

It is a super-2 number, since 2×40802131² = 3329627788282322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40802099 and 40802108.

It is not a weakly prime, because it can be changed into another prime (40800131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20401065 + 20401066.

It is an arithmetic number, because the mean of its divisors is an integer number (20401066).

Almost surely, 2^40802131 is an apocalyptic number.

40802131 is a deficient number, since it is larger than the sum of its proper divisors (1).

40802131 is an equidigital number, since it uses as much as digits as its factorization.

40802131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 40802131 is about 6387.6545773860. The cubic root of 40802131 is about 344.2661176547.

Adding to 40802131 its reverse (13120804), we get a palindrome (53922935).

The spelling of 40802131 in words is "forty million, eight hundred two thousand, one hundred thirty-one".