115213005 has 24 divisors (see below), whose sum is σ = 205102872. Its totient is φ = 59785344.

The previous prime is 115213001. The next prime is 115213009. The reversal of 115213005 is 500312511.

It is an interprime number because it is at equal distance from previous prime (115213001) and next prime (115213009).

It can be written as a sum of positive squares in 4 ways, for example, as 55398249 + 59814756 = 7443^2 + 7734^2 .

It is not a de Polignac number, because 115213005 - 2² = 115213001 is a prime.

It is a super-2 number, since 2×115213005² = 26548073042260050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115213001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32934 + ... + 36263.

It is an arithmetic number, because the mean of its divisors is an integer number (8545953).

Almost surely, 2^115213005 is an apocalyptic number.

115213005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

115213005 is a deficient number, since it is larger than the sum of its proper divisors (89889867).

115213005 is a wasteful number, since it uses less digits than its factorization.

115213005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69245 (or 69242 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 115213005 is about 10733.7321095693. The cubic root of 115213005 is about 486.5944689192.

Adding to 115213005 its reverse (500312511), we get a palindrome (615525516).

The spelling of 115213005 in words is "one hundred fifteen million, two hundred thirteen thousand, five".