215213305125001 has 4 divisors (see below), whose sum is σ = 216402328910404. Its totient is φ = 214024281339600.

The previous prime is 215213305124989. The next prime is 215213305125061. The reversal of 215213305125001 is 100521503312512.

It is a happy number.

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 51140877151225 + 164072427973776 = 7151285^2 + 12809076^2 .

It is a cyclic number.

It is not a de Polignac number, because 215213305125001 - 2⁵ = 215213305124969 is a prime.

It is a super-3 number, since 3×215213305125001³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215213305125061) 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, 594511892430 + ... + 594511892791.

It is an arithmetic number, because the mean of its divisors is an integer number (54100582227601).

Almost surely, 2^{215213305125001} is an apocalyptic number.

It is an amenable number.

215213305125001 is a deficient number, since it is larger than the sum of its proper divisors (1189023785403).

215213305125001 is a wasteful number, since it uses less digits than its factorization.

215213305125001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189023785402.

The product of its (nonzero) digits is 9000, while the sum is 31.

Adding to 215213305125001 its reverse (100521503312512), we get a palindrome (315734808437513).

The spelling of 215213305125001 in words is "two hundred fifteen trillion, two hundred thirteen billion, three hundred five million, one hundred twenty-five thousand, one".