2256545389 has 4 divisors (see below), whose sum is σ = 2578909024. Its totient is φ = 1934181756.

The previous prime is 2256545383. The next prime is 2256545407. The reversal of 2256545389 is 9835456522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2256545389 - 2⁷ = 2256545261 is a prime.

It is a super-2 number, since 2×2256545389² = 10183994185234322642, 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 (2256545383) 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, 161181807 + ... + 161181820.

It is an arithmetic number, because the mean of its divisors is an integer number (644727256).

Almost surely, 2^2256545389 is an apocalyptic number.

It is an amenable number.

2256545389 is a deficient number, since it is larger than the sum of its proper divisors (322363635).

2256545389 is an equidigital number, since it uses as much as digits as its factorization.

2256545389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322363634.

The product of its digits is 2592000, while the sum is 49.

The square root of 2256545389 is about 47503.1092561319. The cubic root of 2256545389 is about 1311.6401167289.

The spelling of 2256545389 in words is "two billion, two hundred fifty-six million, five hundred forty-five thousand, three hundred eighty-nine".