38601221 has 2 divisors, whose sum is σ = 38601222. Its totient is φ = 38601220.

The previous prime is 38601197. The next prime is 38601239. The reversal of 38601221 is 12210683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38130625 + 470596 = 6175^2 + 686^2 .

It is a cyclic number.

It is not a de Polignac number, because 38601221 - 2²² = 34406917 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38631221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19300610 + 19300611.

It is an arithmetic number, because the mean of its divisors is an integer number (19300611).

Almost surely, 2^38601221 is an apocalyptic number.

It is an amenable number.

38601221 is a deficient number, since it is larger than the sum of its proper divisors (1).

38601221 is an equidigital number, since it uses as much as digits as its factorization.

38601221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 38601221 is about 6212.9880894784. The cubic root of 38601221 is about 337.9613327147.

The spelling of 38601221 in words is "thirty-eight million, six hundred one thousand, two hundred twenty-one".