115211997 has 8 divisors (see below), whose sum is σ = 170684480. Its totient is φ = 76807980.

The previous prime is 115211963. The next prime is 115212017. The reversal of 115211997 is 799112511.

It is not a de Polignac number, because 115211997 - 2⁸ = 115211741 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 (115211917) 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, 2133529 + ... + 2133582.

It is an arithmetic number, because the mean of its divisors is an integer number (21335560).

Almost surely, 2^115211997 is an apocalyptic number.

It is an amenable number.

115211997 is a deficient number, since it is larger than the sum of its proper divisors (55472483).

115211997 is an equidigital number, since it uses as much as digits as its factorization.

115211997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4267120 (or 4267114 counting only the distinct ones).

The product of its digits is 5670, while the sum is 36.

The square root of 115211997 is about 10733.6851546894. The cubic root of 115211997 is about 486.5930498414.

The spelling of 115211997 in words is "one hundred fifteen million, two hundred eleven thousand, nine hundred ninety-seven".