2155377723 has 4 divisors (see below), whose sum is σ = 2873836968. Its totient is φ = 1436918480.

The previous prime is 2155377713. The next prime is 2155377751. The reversal of 2155377723 is 3277735512.

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

It is a cyclic number.

It is not a de Polignac number, because 2155377723 - 2¹⁴ = 2155361339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2155377713) 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, 359229618 + ... + 359229623.

It is an arithmetic number, because the mean of its divisors is an integer number (718459242).

Almost surely, 2^2155377723 is an apocalyptic number.

2155377723 is a deficient number, since it is larger than the sum of its proper divisors (718459245).

2155377723 is an equidigital number, since it uses as much as digits as its factorization.

2155377723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718459244.

The product of its digits is 308700, while the sum is 42.

The square root of 2155377723 is about 46426.0457394338. The cubic root of 2155377723 is about 1291.7380819971.

The spelling of 2155377723 in words is "two billion, one hundred fifty-five million, three hundred seventy-seven thousand, seven hundred twenty-three".