2311578897 has 4 divisors (see below), whose sum is σ = 3082105200. Its totient is φ = 1541052596.

The previous prime is 2311578889. The next prime is 2311578901. The reversal of 2311578897 is 7988751132.

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 2311578897 - 2³ = 2311578889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2311578397) 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, 385263147 + ... + 385263152.

It is an arithmetic number, because the mean of its divisors is an integer number (770526300).

Almost surely, 2^2311578897 is an apocalyptic number.

It is an amenable number.

2311578897 is a deficient number, since it is larger than the sum of its proper divisors (770526303).

2311578897 is an equidigital number, since it uses as much as digits as its factorization.

2311578897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770526302.

The product of its digits is 846720, while the sum is 51.

The square root of 2311578897 is about 48078.8820273517. The cubic root of 2311578897 is about 1322.2175186020.

The spelling of 2311578897 in words is "two billion, three hundred eleven million, five hundred seventy-eight thousand, eight hundred ninety-seven".