40310021951 has 2 divisors, whose sum is σ = 40310021952. Its totient is φ = 40310021950.

The previous prime is 40310021933. The next prime is 40310021981. The reversal of 40310021951 is 15912001304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40310021951 - 2¹⁸ = 40309759807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40310021951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40310021981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20155010975 + 20155010976.

It is an arithmetic number, because the mean of its divisors is an integer number (20155010976).

Almost surely, 2^40310021951 is an apocalyptic number.

40310021951 is a deficient number, since it is larger than the sum of its proper divisors (1).

40310021951 is an equidigital number, since it uses as much as digits as its factorization.

40310021951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The spelling of 40310021951 in words is "forty billion, three hundred ten million, twenty-one thousand, nine hundred fifty-one".