33243402253 has 4 divisors (see below), whose sum is σ = 33254716320. Its totient is φ = 33232088188.

The previous prime is 33243402223. The next prime is 33243402317. The reversal of 33243402253 is 35220434233.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35220434233 = 17 ⋅2071790249.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33243402253 is a prime.

It is a super-2 number, since 2×33243402253² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33243402223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5652625 + ... + 5658502.

It is an arithmetic number, because the mean of its divisors is an integer number (8313679080).

Almost surely, 2^33243402253 is an apocalyptic number.

It is an amenable number.

33243402253 is a deficient number, since it is larger than the sum of its proper divisors (11314067).

33243402253 is a wasteful number, since it uses less digits than its factorization.

33243402253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11314066.

The product of its (nonzero) digits is 51840, while the sum is 31.

Adding to 33243402253 its reverse (35220434233), we get a palindrome (68463836486).

The spelling of 33243402253 in words is "thirty-three billion, two hundred forty-three million, four hundred two thousand, two hundred fifty-three".