2155658533 has 4 divisors (see below), whose sum is σ = 2463609760. Its totient is φ = 1847707308.

The previous prime is 2155658473. The next prime is 2155658539. The reversal of 2155658533 is 3358565512.

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.

It is a cyclic number.

It is not a de Polignac number, because 2155658533 - 2²¹ = 2153561381 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2155658533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155658539) 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, 153975603 + ... + 153975616.

It is an arithmetic number, because the mean of its divisors is an integer number (615902440).

Almost surely, 2^2155658533 is an apocalyptic number.

It is an amenable number.

2155658533 is a deficient number, since it is larger than the sum of its proper divisors (307951227).

2155658533 is an equidigital number, since it uses as much as digits as its factorization.

2155658533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307951226.

The product of its digits is 540000, while the sum is 43.

The square root of 2155658533 is about 46429.0699131482. The cubic root of 2155658533 is about 1291.7941769165.

It can be divided in two parts, 21556 and 58533, that added together give a square (80089 = 283²).

The spelling of 2155658533 in words is "two billion, one hundred fifty-five million, six hundred fifty-eight thousand, five hundred thirty-three".