113000022581 has 2 divisors, whose sum is σ = 113000022582. Its totient is φ = 113000022580.

The previous prime is 113000022559. The next prime is 113000022689. The reversal of 113000022581 is 185220000311.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100764344356 + 12235678225 = 317434^2 + 110615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113000022581 is a prime.

It is a super-2 number, since 2×113000022581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113000022481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56500011290 + 56500011291.

It is an arithmetic number, because the mean of its divisors is an integer number (56500011291).

Almost surely, 2^113000022581 is an apocalyptic number.

It is an amenable number.

113000022581 is a deficient number, since it is larger than the sum of its proper divisors (1).

113000022581 is an equidigital number, since it uses as much as digits as its factorization.

113000022581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 113000022581 its reverse (185220000311), we get a palindrome (298220022892).

The spelling of 113000022581 in words is "one hundred thirteen billion, twenty-two thousand, five hundred eighty-one".