2256534989 has 2 divisors, whose sum is σ = 2256534990. Its totient is φ = 2256534988.

The previous prime is 2256534983. The next prime is 2256535013. The reversal of 2256534989 is 9894356522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1300179364 + 956355625 = 36058^2 + 30925^2 .

It is a cyclic number.

It is not a de Polignac number, because 2256534989 - 2¹² = 2256530893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2256534989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2256534983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128267494 + 1128267495.

It is an arithmetic number, because the mean of its divisors is an integer number (1128267495).

Almost surely, 2^2256534989 is an apocalyptic number.

It is an amenable number.

2256534989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256534989 is an equidigital number, since it uses as much as digits as its factorization.

2256534989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4665600, while the sum is 53.

The square root of 2256534989 is about 47502.9997894870. Note that the first 3 decimals coincide. The cubic root of 2256534989 is about 1311.6381016903.

The spelling of 2256534989 in words is "two billion, two hundred fifty-six million, five hundred thirty-four thousand, nine hundred eighty-nine".