2291994057 has 16 divisors (see below), whose sum is σ = 3160535040. Its totient is φ = 1476548112.

The previous prime is 2291994017. The next prime is 2291994071. The reversal of 2291994057 is 7504991922.

It is not a de Polignac number, because 2291994057 - 2¹¹ = 2291992009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2291993997 and 2291994015.

It is not an unprimeable number, because it can be changed into a prime (2291994017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91743 + ... + 114020.

It is an arithmetic number, because the mean of its divisors is an integer number (197533440).

Almost surely, 2^2291994057 is an apocalyptic number.

It is an amenable number.

2291994057 is a deficient number, since it is larger than the sum of its proper divisors (868540983).

2291994057 is a wasteful number, since it uses less digits than its factorization.

2291994057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205892.

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 2291994057 is about 47874.7747462064. The cubic root of 2291994057 is about 1318.4727624814.

The spelling of 2291994057 in words is "two billion, two hundred ninety-one million, nine hundred ninety-four thousand, fifty-seven".