38315971 has 2 divisors, whose sum is σ = 38315972. Its totient is φ = 38315970.

The previous prime is 38315947. The next prime is 38315983. The reversal of 38315971 is 17951383.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38315971 - 2⁷ = 38315843 is a prime.

It is a super-2 number, since 2×38315971² = 2936227267345682, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38315971.

It is not a weakly prime, because it can be changed into another prime (38315911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19157985 + 19157986.

It is an arithmetic number, because the mean of its divisors is an integer number (19157986).

Almost surely, 2^38315971 is an apocalyptic number.

38315971 is a deficient number, since it is larger than the sum of its proper divisors (1).

38315971 is an equidigital number, since it uses as much as digits as its factorization.

38315971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 37.

The square root of 38315971 is about 6189.9895799589. The cubic root of 38315971 is about 337.1268002794.

The spelling of 38315971 in words is "thirty-eight million, three hundred fifteen thousand, nine hundred seventy-one".