2291532557 has 4 divisors (see below), whose sum is σ = 2291661276. Its totient is φ = 2291403840.

The previous prime is 2291532553. The next prime is 2291532583. The reversal of 2291532557 is 7552351922.

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 2214549481 + 76983076 = 47059^2 + 8774^2 .

It is a cyclic number.

It is not a de Polignac number, because 2291532557 - 2² = 2291532553 is a prime.

It is a super-2 number, since 2×2291532557² = 10502242919581916498, 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 (2291532553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32348 + ... + 75029.

It is an arithmetic number, because the mean of its divisors is an integer number (572915319).

Almost surely, 2^2291532557 is an apocalyptic number.

It is an amenable number.

2291532557 is a deficient number, since it is larger than the sum of its proper divisors (128719).

2291532557 is a wasteful number, since it uses less digits than its factorization.

2291532557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128718.

The product of its digits is 189000, while the sum is 41.

The square root of 2291532557 is about 47869.9546375386. The cubic root of 2291532557 is about 1318.3842637028.

The spelling of 2291532557 in words is "two billion, two hundred ninety-one million, five hundred thirty-two thousand, five hundred fifty-seven".