215344121245 has 32 divisors (see below), whose sum is σ = 289776216960. Its totient is φ = 152248400640.

The previous prime is 215344121221. The next prime is 215344121273. The reversal of 215344121245 is 542121443512.

It is not a de Polignac number, because 215344121245 - 2¹¹ = 215344119197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215344121245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2321211 + ... + 2412199.

It is an arithmetic number, because the mean of its divisors is an integer number (9055506780).

Almost surely, 2^215344121245 is an apocalyptic number.

It is an amenable number.

215344121245 is a deficient number, since it is larger than the sum of its proper divisors (74432095715).

215344121245 is a wasteful number, since it uses less digits than its factorization.

215344121245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92205.

The product of its digits is 38400, while the sum is 34.

Adding to 215344121245 its reverse (542121443512), we get a palindrome (757465564757).

The spelling of 215344121245 in words is "two hundred fifteen billion, three hundred forty-four million, one hundred twenty-one thousand, two hundred forty-five".