40531030621 has 2 divisors, whose sum is σ = 40531030622. Its totient is φ = 40531030620.

The previous prime is 40531030597. The next prime is 40531030637. The reversal of 40531030621 is 12603013504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40274870596 + 256160025 = 200686^2 + 16005^2 .

It is a cyclic number.

It is not a de Polignac number, because 40531030621 - 2²⁵ = 40497476189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40531030651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20265515310 + 20265515311.

It is an arithmetic number, because the mean of its divisors is an integer number (20265515311).

Almost surely, 2^40531030621 is an apocalyptic number.

It is an amenable number.

40531030621 is a deficient number, since it is larger than the sum of its proper divisors (1).

40531030621 is an equidigital number, since it uses as much as digits as its factorization.

40531030621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The spelling of 40531030621 in words is "forty billion, five hundred thirty-one million, thirty thousand, six hundred twenty-one".