115213445 has 8 divisors (see below), whose sum is σ = 140523000. Its totient is φ = 90659520.

The previous prime is 115213429. The next prime is 115213447. The reversal of 115213445 is 544312511.

It can be written as a sum of positive squares in 4 ways, for example, as 3678724 + 111534721 = 1918^2 + 10561^2 .

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

It is not a de Polignac number, because 115213445 - 2⁴ = 115213429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115213447) 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, 188570 + ... + 189179.

It is an arithmetic number, because the mean of its divisors is an integer number (17565375).

Almost surely, 2^115213445 is an apocalyptic number.

It is an amenable number.

115213445 is a deficient number, since it is larger than the sum of its proper divisors (25309555).

115213445 is an equidigital number, since it uses as much as digits as its factorization.

115213445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377815.

The product of its digits is 2400, while the sum is 26.

The square root of 115213445 is about 10733.7526056827. The cubic root of 115213445 is about 486.5950883553.

Adding to 115213445 its reverse (544312511), we get a palindrome (659525956).

The spelling of 115213445 in words is "one hundred fifteen million, two hundred thirteen thousand, four hundred forty-five".