115211545 has 4 divisors (see below), whose sum is σ = 138253860. Its totient is φ = 92169232.

The previous prime is 115211539. The next prime is 115211549. The reversal of 115211545 is 545112511.

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

It can be written as a sum of positive squares in 2 ways, for example, as 39538944 + 75672601 = 6288^2 + 8699^2 .

It is a cyclic number.

It is not a de Polignac number, because 115211545 - 2¹³ = 115203353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115211549) 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, 11521150 + ... + 11521159.

It is an arithmetic number, because the mean of its divisors is an integer number (34563465).

Almost surely, 2^115211545 is an apocalyptic number.

It is an amenable number.

115211545 is a deficient number, since it is larger than the sum of its proper divisors (23042315).

115211545 is an equidigital number, since it uses as much as digits as its factorization.

115211545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23042314.

The product of its digits is 1000, while the sum is 25.

The square root of 115211545 is about 10733.6640994583. The cubic root of 115211545 is about 486.5924135062.

The spelling of 115211545 in words is "one hundred fifteen million, two hundred eleven thousand, five hundred forty-five".