38821501 has 2 divisors, whose sum is σ = 38821502. Its totient is φ = 38821500.

The previous prime is 38821477. The next prime is 38821511. The reversal of 38821501 is 10512883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20340100 + 18481401 = 4510^2 + 4299^2 .

It is an emirp because it is prime and its reverse (10512883) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38821501 - 2¹³ = 38813309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38821501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38821511) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19410750 + 19410751.

It is an arithmetic number, because the mean of its divisors is an integer number (19410751).

Almost surely, 2^38821501 is an apocalyptic number.

It is an amenable number.

38821501 is a deficient number, since it is larger than the sum of its proper divisors (1).

38821501 is an equidigital number, since it uses as much as digits as its factorization.

38821501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 38821501 is about 6230.6902506865. The cubic root of 38821501 is about 338.6029787334.

The spelling of 38821501 in words is "thirty-eight million, eight hundred twenty-one thousand, five hundred one".