40531213517 has 2 divisors, whose sum is σ = 40531213518. Its totient is φ = 40531213516.

The previous prime is 40531213501. The next prime is 40531213543. The reversal of 40531213517 is 71531213504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28348793641 + 12182419876 = 168371^2 + 110374^2 .

It is a cyclic number.

It is not a de Polignac number, because 40531213517 - 2⁴ = 40531213501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40531213577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20265606758 + 20265606759.

It is an arithmetic number, because the mean of its divisors is an integer number (20265606759).

Almost surely, 2^40531213517 is an apocalyptic number.

It is an amenable number.

40531213517 is a deficient number, since it is larger than the sum of its proper divisors (1).

40531213517 is an equidigital number, since it uses as much as digits as its factorization.

40531213517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 32.

The spelling of 40531213517 in words is "forty billion, five hundred thirty-one million, two hundred thirteen thousand, five hundred seventeen".