2291857957 has 12 divisors (see below), whose sum is σ = 2446042860. Its totient is φ = 2146807872.

The previous prime is 2291857949. The next prime is 2291857973. The reversal of 2291857957 is 7597581922.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 678550401 + 1613307556 = 26049^2 + 40166^2 .

It is not a de Polignac number, because 2291857957 - 2³ = 2291857949 is a prime.

It is a super-2 number, since 2×2291857957² = 10505225790128427698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2291857898 and 2291857907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291857937) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3538 + ... + 67795.

It is an arithmetic number, because the mean of its divisors is an integer number (203836905).

Almost surely, 2^2291857957 is an apocalyptic number.

It is an amenable number.

2291857957 is a deficient number, since it is larger than the sum of its proper divisors (154184903).

2291857957 is an equidigital number, since it uses as much as digits as its factorization.

2291857957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71460 (or 71441 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 55.

The square root of 2291857957 is about 47873.3533084951. The cubic root of 2291857957 is about 1318.4466647268.

The spelling of 2291857957 in words is "two billion, two hundred ninety-one million, eight hundred fifty-seven thousand, nine hundred fifty-seven".