215126135313 has 32 divisors (see below), whose sum is σ = 310005411840. Its totient is φ = 132289523520.

The previous prime is 215126135291. The next prime is 215126135423. The reversal of 215126135313 is 313531621512.

It is not a de Polignac number, because 215126135313 - 2³³ = 206536200721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215126130313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1581508 + ... + 1712138.

It is an arithmetic number, because the mean of its divisors is an integer number (9687669120).

Almost surely, 2^215126135313 is an apocalyptic number.

215126135313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

215126135313 is a deficient number, since it is larger than the sum of its proper divisors (94879276527).

215126135313 is a wasteful number, since it uses less digits than its factorization.

215126135313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131509.

The product of its digits is 16200, while the sum is 33.

Adding to 215126135313 its reverse (313531621512), we get a palindrome (528657756825).

The spelling of 215126135313 in words is "two hundred fifteen billion, one hundred twenty-six million, one hundred thirty-five thousand, three hundred thirteen".