38222521 has 2 divisors, whose sum is σ = 38222522. Its totient is φ = 38222520.

The previous prime is 38222519. The next prime is 38222543. The reversal of 38222521 is 12522283.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38007225 + 215296 = 6165^2 + 464^2 .

It is a cyclic number.

It is not a de Polignac number, because 38222521 - 2¹ = 38222519 is a prime.

It is a super-2 number, since 2×38222521² = 2921922223190882, which contains 22 as substring.

Together with 38222519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (38222321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19111260 + 19111261.

It is an arithmetic number, because the mean of its divisors is an integer number (19111261).

Almost surely, 2^38222521 is an apocalyptic number.

It is an amenable number.

38222521 is a deficient number, since it is larger than the sum of its proper divisors (1).

38222521 is an equidigital number, since it uses as much as digits as its factorization.

38222521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 25.

The square root of 38222521 is about 6182.4364938105. The cubic root of 38222521 is about 336.8525008523.

The spelling of 38222521 in words is "thirty-eight million, two hundred twenty-two thousand, five hundred twenty-one".