38223121 has 4 divisors (see below), whose sum is σ = 38236212. Its totient is φ = 38210032.

The previous prime is 38223067. The next prime is 38223151. The reversal of 38223121 is 12132283.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12132283 = 53 ⋅228911.

It can be written as a sum of positive squares in 2 ways, for example, as 8673025 + 29550096 = 2945^2 + 5436^2 .

It is a cyclic number.

It is not a de Polignac number, because 38223121 - 2⁷ = 38222993 is a prime.

It is a super-2 number, since 2×38223121² = 2922013957961282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38223092 and 38223101.

It is not an unprimeable number, because it can be changed into a prime (38223151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51 + ... + 8743.

It is an arithmetic number, because the mean of its divisors is an integer number (9559053).

Almost surely, 2^38223121 is an apocalyptic number.

It is an amenable number.

38223121 is a deficient number, since it is larger than the sum of its proper divisors (13091).

38223121 is an equidigital number, since it uses as much as digits as its factorization.

38223121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13090.

The product of its digits is 576, while the sum is 22.

The square root of 38223121 is about 6182.4850181784. The cubic root of 38223121 is about 336.8542634296.

The spelling of 38223121 in words is "thirty-eight million, two hundred twenty-three thousand, one hundred twenty-one".