2258135849 has 4 divisors (see below), whose sum is σ = 2260265220. Its totient is φ = 2256006480.

The previous prime is 2258135827. The next prime is 2258135879. The reversal of 2258135849 is 9485318522.

It is a happy number.

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 1319142400 + 938993449 = 36320^2 + 30643^2 .

It is a cyclic number.

It is not a de Polignac number, because 2258135849 - 2²⁴ = 2241358633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2258135879) 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, 1063094 + ... + 1065215.

It is an arithmetic number, because the mean of its divisors is an integer number (565066305).

Almost surely, 2^2258135849 is an apocalyptic number.

It is an amenable number.

2258135849 is a deficient number, since it is larger than the sum of its proper divisors (2129371).

2258135849 is a wasteful number, since it uses less digits than its factorization.

2258135849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129370.

The product of its digits is 691200, while the sum is 47.

The square root of 2258135849 is about 47519.8468957971. The cubic root of 2258135849 is about 1311.9482014131.

The spelling of 2258135849 in words is "two billion, two hundred fifty-eight million, one hundred thirty-five thousand, eight hundred forty-nine".