38361221 has 2 divisors, whose sum is σ = 38361222. Its totient is φ = 38361220.

The previous prime is 38361187. The next prime is 38361251. The reversal of 38361221 is 12216383.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31528225 + 6832996 = 5615^2 + 2614^2 .

It is a cyclic number.

It is not a de Polignac number, because 38361221 - 2⁶ = 38361157 is a prime.

It is a super-2 number, since 2×38361221² = 2943166553221682, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38361251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19180610 + 19180611.

It is an arithmetic number, because the mean of its divisors is an integer number (19180611).

Almost surely, 2^38361221 is an apocalyptic number.

It is an amenable number.

38361221 is a deficient number, since it is larger than the sum of its proper divisors (1).

38361221 is an equidigital number, since it uses as much as digits as its factorization.

38361221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 26.

The square root of 38361221 is about 6193.6435964624. The cubic root of 38361221 is about 337.2594602471.

The spelling of 38361221 in words is "thirty-eight million, three hundred sixty-one thousand, two hundred twenty-one".