115226781 has 4 divisors (see below), whose sum is σ = 153635712. Its totient is φ = 76817852.

The previous prime is 115226779. The next prime is 115226861. The reversal of 115226781 is 187622511.

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 115226781 - 2¹ = 115226779 is a prime.

It is a super-2 number, since 2×115226781² = 26554422119243922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115226701) 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, 19204461 + ... + 19204466.

It is an arithmetic number, because the mean of its divisors is an integer number (38408928).

Almost surely, 2^115226781 is an apocalyptic number.

It is an amenable number.

115226781 is a deficient number, since it is larger than the sum of its proper divisors (38408931).

115226781 is an equidigital number, since it uses as much as digits as its factorization.

115226781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38408930.

The product of its digits is 6720, while the sum is 33.

The square root of 115226781 is about 10734.3738056768. The cubic root of 115226781 is about 486.6138621530.

The spelling of 115226781 in words is "one hundred fifteen million, two hundred twenty-six thousand, seven hundred eighty-one".