215322001001 has 4 divisors (see below), whose sum is σ = 215375079252. Its totient is φ = 215268922752.

The previous prime is 215322000991. The next prime is 215322001021. The reversal of 215322001001 is 100100223512.

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 78792490000 + 136529511001 = 280700^2 + 369499^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215322001001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215322001021) 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, 26533040 + ... + 26541153.

It is an arithmetic number, because the mean of its divisors is an integer number (53843769813).

Almost surely, 2^215322001001 is an apocalyptic number.

It is an amenable number.

215322001001 is a deficient number, since it is larger than the sum of its proper divisors (53078251).

215322001001 is an equidigital number, since it uses as much as digits as its factorization.

215322001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53078250.

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 215322001001 its reverse (100100223512), we get a palindrome (315422224513).

The spelling of 215322001001 in words is "two hundred fifteen billion, three hundred twenty-two million, one thousand, one".