33242309 has 2 divisors, whose sum is σ = 33242310. Its totient is φ = 33242308.

The previous prime is 33242303. The next prime is 33242329. The reversal of 33242309 is 90324233.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29052100 + 4190209 = 5390^2 + 2047^2 .

It is a cyclic number.

It is not a de Polignac number, because 33242309 - 2²⁴ = 16465093 is a prime.

It is a super-2 number, since 2×33242309² = 2210102215302962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33242303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16621154 + 16621155.

It is an arithmetic number, because the mean of its divisors is an integer number (16621155).

Almost surely, 2^33242309 is an apocalyptic number.

It is an amenable number.

33242309 is a deficient number, since it is larger than the sum of its proper divisors (1).

33242309 is an equidigital number, since it uses as much as digits as its factorization.

33242309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 33242309 is about 5765.6143644888. The cubic root of 33242309 is about 321.5365843882.

It can be divided in two parts, 33242 and 309, that multiplied together give a triangular number (10271778 = T₄₅₃₂).

The spelling of 33242309 in words is "thirty-three million, two hundred forty-two thousand, three hundred nine".