33057421 has 2 divisors, whose sum is σ = 33057422. Its totient is φ = 33057420.

The previous prime is 33057413. The next prime is 33057461. The reversal of 33057421 is 12475033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16695396 + 16362025 = 4086^2 + 4045^2 .

It is a cyclic number.

It is not a de Polignac number, because 33057421 - 2³ = 33057413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33057461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16528710 + 16528711.

It is an arithmetic number, because the mean of its divisors is an integer number (16528711).

Almost surely, 2^33057421 is an apocalyptic number.

It is an amenable number.

33057421 is a deficient number, since it is larger than the sum of its proper divisors (1).

33057421 is an equidigital number, since it uses as much as digits as its factorization.

33057421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 33057421 is about 5749.5583308633. The cubic root of 33057421 is about 320.9393654296.

The spelling of 33057421 in words is "thirty-three million, fifty-seven thousand, four hundred twenty-one".