33421457 has 2 divisors, whose sum is σ = 33421458. Its totient is φ = 33421456.

The previous prime is 33421433. The next prime is 33421463. The reversal of 33421457 is 75412433.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20106256 + 13315201 = 4484^2 + 3649^2 .

It is an emirp because it is prime and its reverse (75412433) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33421457 - 2²² = 29227153 is a prime.

It is a super-2 number, since 2×33421457² = 2233987576005698, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (33421417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16710728 + 16710729.

It is an arithmetic number, because the mean of its divisors is an integer number (16710729).

Almost surely, 2^33421457 is an apocalyptic number.

It is an amenable number.

33421457 is a deficient number, since it is larger than the sum of its proper divisors (1).

33421457 is an equidigital number, since it uses as much as digits as its factorization.

33421457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 29.

The square root of 33421457 is about 5781.1293879310. The cubic root of 33421457 is about 322.1131535247.

The spelling of 33421457 in words is "thirty-three million, four hundred twenty-one thousand, four hundred fifty-seven".