38227921 has 2 divisors, whose sum is σ = 38227922. Its totient is φ = 38227920.

The previous prime is 38227913. The next prime is 38227957. The reversal of 38227921 is 12972283.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37344321 + 883600 = 6111^2 + 940^2 .

It is a cyclic number.

It is not a de Polignac number, because 38227921 - 2³ = 38227913 is a prime.

It is a super-2 number, since 2×38227921² = 2922747887964482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38227961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19113960 + 19113961.

It is an arithmetic number, because the mean of its divisors is an integer number (19113961).

Almost surely, 2^38227921 is an apocalyptic number.

It is an amenable number.

38227921 is a deficient number, since it is larger than the sum of its proper divisors (1).

38227921 is an equidigital number, since it uses as much as digits as its factorization.

38227921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 38227921 is about 6182.8731994114. The cubic root of 38227921 is about 336.8683633840.

The spelling of 38227921 in words is "thirty-eight million, two hundred twenty-seven thousand, nine hundred twenty-one".