38540215631 has 2 divisors, whose sum is σ = 38540215632. Its totient is φ = 38540215630.

The previous prime is 38540215603. The next prime is 38540215639. The reversal of 38540215631 is 13651204583.

It is a happy number.

38540215631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (13651204583) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38540215631 is a prime.

It is a super-2 number, since 2×38540215631² (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 (38540215639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19270107815 + 19270107816.

It is an arithmetic number, because the mean of its divisors is an integer number (19270107816).

Almost surely, 2^38540215631 is an apocalyptic number.

38540215631 is a deficient number, since it is larger than the sum of its proper divisors (1).

38540215631 is an equidigital number, since it uses as much as digits as its factorization.

38540215631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 38540215631 in words is "thirty-eight billion, five hundred forty million, two hundred fifteen thousand, six hundred thirty-one".