2857222491 has 4 divisors (see below), whose sum is σ = 3809629992. Its totient is φ = 1904814992.

The previous prime is 2857222481. The next prime is 2857222517. The reversal of 2857222491 is 1942227582.

2857222491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2857222491 - 2⁷ = 2857222363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2857222411) 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, 476203746 + ... + 476203751.

It is an arithmetic number, because the mean of its divisors is an integer number (952407498).

Almost surely, 2^2857222491 is an apocalyptic number.

2857222491 is a deficient number, since it is larger than the sum of its proper divisors (952407501).

2857222491 is an equidigital number, since it uses as much as digits as its factorization.

2857222491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952407500.

The product of its digits is 161280, while the sum is 42.

The square root of 2857222491 is about 53452.9932838190. The cubic root of 2857222491 is about 1418.9965950788.

The spelling of 2857222491 in words is "two billion, eight hundred fifty-seven million, two hundred twenty-two thousand, four hundred ninety-one".