2155380267 has 4 divisors (see below), whose sum is σ = 2873840360. Its totient is φ = 1436920176.

The previous prime is 2155380263. The next prime is 2155380281. The reversal of 2155380267 is 7620835512.

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

It is not a de Polignac number, because 2155380267 - 2² = 2155380263 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2155380263) 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, 359230042 + ... + 359230047.

It is an arithmetic number, because the mean of its divisors is an integer number (718460090).

Almost surely, 2^2155380267 is an apocalyptic number.

2155380267 is a deficient number, since it is larger than the sum of its proper divisors (718460093).

2155380267 is an equidigital number, since it uses as much as digits as its factorization.

2155380267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718460092.

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 2155380267 is about 46426.0731378393. The cubic root of 2155380267 is about 1291.7385902112.

The spelling of 2155380267 in words is "two billion, one hundred fifty-five million, three hundred eighty thousand, two hundred sixty-seven".