2291527157 has 4 divisors (see below), whose sum is σ = 2292636780. Its totient is φ = 2290417536.

The previous prime is 2291527141. The next prime is 2291527169. The reversal of 2291527157 is 7517251922.

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

It can be written as a sum of positive squares in 2 ways, for example, as 605110801 + 1686416356 = 24599^2 + 41066^2 .

It is a cyclic number.

It is not a de Polignac number, because 2291527157 - 2⁴ = 2291527141 is a prime.

It is a super-2 number, since 2×2291527157² = 10502193422537005298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291527177) 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, 551708 + ... + 555845.

It is an arithmetic number, because the mean of its divisors is an integer number (573159195).

Almost surely, 2^2291527157 is an apocalyptic number.

It is an amenable number.

2291527157 is a deficient number, since it is larger than the sum of its proper divisors (1109623).

2291527157 is a wasteful number, since it uses less digits than its factorization.

2291527157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109622.

The product of its digits is 88200, while the sum is 41.

The square root of 2291527157 is about 47869.8982346944. The cubic root of 2291527157 is about 1318.3832281104.

The spelling of 2291527157 in words is "two billion, two hundred ninety-one million, five hundred twenty-seven thousand, one hundred fifty-seven".