33155213 has 48 divisors (see below), whose sum is σ = 45351936. Its totient is φ = 23950080.

The previous prime is 33155159. The next prime is 33155251. The reversal of 33155213 is 31255133.

It is not a de Polignac number, because 33155213 - 2¹⁰ = 33154189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33155113) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 454145 + ... + 454217.

It is an arithmetic number, because the mean of its divisors is an integer number (944832).

Almost surely, 2^33155213 is an apocalyptic number.

It is an amenable number.

33155213 is a deficient number, since it is larger than the sum of its proper divisors (12196723).

33155213 is a wasteful number, since it uses less digits than its factorization.

33155213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 147 counting only the distinct ones).

The product of its digits is 1350, while the sum is 23.

The square root of 33155213 is about 5758.0563560979. The cubic root of 33155213 is about 321.2555264584.

The spelling of 33155213 in words is "thirty-three million, one hundred fifty-five thousand, two hundred thirteen".