2155275293 has 4 divisors (see below), whose sum is σ = 2159259708. Its totient is φ = 2151290880.

The previous prime is 2155275281. The next prime is 2155275337. The reversal of 2155275293 is 3925725512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 487614724 + 1667660569 = 22082^2 + 40837^2 .

It is a cyclic number.

It is not a de Polignac number, because 2155275293 - 2¹² = 2155271197 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 2155275293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155275223) 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, 1991396 + ... + 1992477.

It is an arithmetic number, because the mean of its divisors is an integer number (539814927).

Almost surely, 2^2155275293 is an apocalyptic number.

It is an amenable number.

2155275293 is a deficient number, since it is larger than the sum of its proper divisors (3984415).

2155275293 is an equidigital number, since it uses as much as digits as its factorization.

2155275293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3984414.

The product of its digits is 189000, while the sum is 41.

The square root of 2155275293 is about 46424.9425740086. The cubic root of 2155275293 is about 1291.7176192531.

The spelling of 2155275293 in words is "two billion, one hundred fifty-five million, two hundred seventy-five thousand, two hundred ninety-three".