33505491225 has 12 divisors (see below), whose sum is σ = 55395745616. Its totient is φ = 17869595280.

The previous prime is 33505491221. The next prime is 33505491317. The reversal of 33505491225 is 52219450533.

It is not a de Polignac number, because 33505491225 - 2² = 33505491221 is a prime.

It is a super-2 number, since 2×33505491225² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33505491221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 223369867 + ... + 223370016.

Almost surely, 2^33505491225 is an apocalyptic number.

It is an amenable number.

33505491225 is a deficient number, since it is larger than the sum of its proper divisors (21890254391).

33505491225 is a wasteful number, since it uses less digits than its factorization.

33505491225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446739896 (or 446739891 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 39.

The spelling of 33505491225 in words is "thirty-three billion, five hundred five million, four hundred ninety-one thousand, two hundred twenty-five".