2057304991 has 4 divisors (see below), whose sum is σ = 2351205712. Its totient is φ = 1763404272.

The previous prime is 2057304983. The next prime is 2057305021. The reversal of 2057304991 is 1994037502.

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

It is not a de Polignac number, because 2057304991 - 2³ = 2057304983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2057304941) 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, 146950350 + ... + 146950363.

It is an arithmetic number, because the mean of its divisors is an integer number (587801428).

Almost surely, 2^2057304991 is an apocalyptic number.

2057304991 is a deficient number, since it is larger than the sum of its proper divisors (293900721).

2057304991 is an equidigital number, since it uses as much as digits as its factorization.

2057304991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293900720.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 2057304991 is about 45357.5240836622. The cubic root of 2057304991 is about 1271.8412112002.

The spelling of 2057304991 in words is "two billion, fifty-seven million, three hundred four thousand, nine hundred ninety-one".