33238921 has 2 divisors, whose sum is σ = 33238922. Its totient is φ = 33238920.

The previous prime is 33238903. The next prime is 33238939. The reversal of 33238921 is 12983233.

It is a balanced prime because it is at equal distance from previous prime (33238903) and next prime (33238939).

It can be written as a sum of positive squares in only one way, i.e., 22090000 + 11148921 = 4700^2 + 3339^2 .

It is a cyclic number.

It is not a de Polignac number, because 33238921 - 2¹¹ = 33236873 is a prime.

It is a super-2 number, since 2×33238921² = 2209651738488482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33238951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16619460 + 16619461.

It is an arithmetic number, because the mean of its divisors is an integer number (16619461).

Almost surely, 2^33238921 is an apocalyptic number.

It is an amenable number.

33238921 is a deficient number, since it is larger than the sum of its proper divisors (1).

33238921 is an equidigital number, since it uses as much as digits as its factorization.

33238921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 33238921 is about 5765.3205461622. The cubic root of 33238921 is about 321.5256605285.

The spelling of 33238921 in words is "thirty-three million, two hundred thirty-eight thousand, nine hundred twenty-one".