115551643 has 4 divisors (see below), whose sum is σ = 115588440. Its totient is φ = 115514848.

The previous prime is 115551619. The next prime is 115551647. The reversal of 115551643 is 346155511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 115551643 - 2⁹ = 115551131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115551647) 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, 13198 + ... + 20131.

It is an arithmetic number, because the mean of its divisors is an integer number (28897110).

Almost surely, 2^115551643 is an apocalyptic number.

115551643 is a deficient number, since it is larger than the sum of its proper divisors (36797).

115551643 is an equidigital number, since it uses as much as digits as its factorization.

115551643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36796.

The product of its digits is 9000, while the sum is 31.

The square root of 115551643 is about 10749.4950113947. The cubic root of 115551643 is about 487.0707409602.

The spelling of 115551643 in words is "one hundred fifteen million, five hundred fifty-one thousand, six hundred forty-three".