33243442457 has 2 divisors, whose sum is σ = 33243442458. Its totient is φ = 33243442456.

The previous prime is 33243442423. The next prime is 33243442493. The reversal of 33243442457 is 75424434233.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29067181081 + 4176261376 = 170491^2 + 64624^2 .

It is an emirp because it is prime and its reverse (75424434233) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33243442457 - 2²⁰ = 33242393881 is a prime.

It is a super-2 number, since 2×33243442457² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33243442957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16621721228 + 16621721229.

It is an arithmetic number, because the mean of its divisors is an integer number (16621721229).

Almost surely, 2^33243442457 is an apocalyptic number.

It is an amenable number.

33243442457 is a deficient number, since it is larger than the sum of its proper divisors (1).

33243442457 is an equidigital number, since it uses as much as digits as its factorization.

33243442457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 41.

The spelling of 33243442457 in words is "thirty-three billion, two hundred forty-three million, four hundred forty-two thousand, four hundred fifty-seven".