2155545533 has 16 divisors (see below), whose sum is σ = 2296964736. Its totient is φ = 2018522880.

The previous prime is 2155545529. The next prime is 2155545559. The reversal of 2155545533 is 3355455512.

It is a cyclic number.

It is not a de Polignac number, because 2155545533 - 2² = 2155545529 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155544533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225338 + ... + 234708.

It is an arithmetic number, because the mean of its divisors is an integer number (143560296).

Almost surely, 2^2155545533 is an apocalyptic number.

2155545533 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2155545533 is a deficient number, since it is larger than the sum of its proper divisors (141419203).

2155545533 is a wasteful number, since it uses less digits than its factorization.

2155545533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9604.

The product of its digits is 225000, while the sum is 38.

The square root of 2155545533 is about 46427.8529871886. The cubic root of 2155545533 is about 1291.7716044960.

The spelling of 2155545533 in words is "two billion, one hundred fifty-five million, five hundred forty-five thousand, five hundred thirty-three".