115133213 has 8 divisors (see below), whose sum is σ = 124073208. Its totient is φ = 106205184.

The previous prime is 115133209. The next prime is 115133237. The reversal of 115133213 is 312331511.

It can be written as a sum of positive squares in 4 ways, for example, as 46607929 + 68525284 = 6827^2 + 8278^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115133213 - 2² = 115133209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115133203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34181 + ... + 37397.

It is an arithmetic number, because the mean of its divisors is an integer number (15509151).

Almost surely, 2^115133213 is an apocalyptic number.

115133213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

115133213 is a deficient number, since it is larger than the sum of its proper divisors (8939995).

115133213 is a wasteful number, since it uses less digits than its factorization.

115133213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5983.

The product of its digits is 270, while the sum is 20.

The square root of 115133213 is about 10730.0145852650. The cubic root of 115133213 is about 486.4821109074.

Adding to 115133213 its reverse (312331511), we get a palindrome (427464724).

The spelling of 115133213 in words is "one hundred fifteen million, one hundred thirty-three thousand, two hundred thirteen".