215155241401 has 4 divisors (see below), whose sum is σ = 215171762932. Its totient is φ = 215138719872.

The previous prime is 215155241381. The next prime is 215155241449. The reversal of 215155241401 is 104142551512.

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 97796925625 + 117358315776 = 312725^2 + 342576^2 .

It is a cyclic number.

It is not a de Polignac number, because 215155241401 - 2²⁷ = 215021023673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215155241471) 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, 8241216 + ... + 8267281.

It is an arithmetic number, because the mean of its divisors is an integer number (53792940733).

Almost surely, 2^215155241401 is an apocalyptic number.

It is an amenable number.

215155241401 is a deficient number, since it is larger than the sum of its proper divisors (16521531).

215155241401 is a wasteful number, since it uses less digits than its factorization.

215155241401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16521530.

The product of its (nonzero) digits is 8000, while the sum is 31.

Adding to 215155241401 its reverse (104142551512), we get a palindrome (319297792913).

The spelling of 215155241401 in words is "two hundred fifteen billion, one hundred fifty-five million, two hundred forty-one thousand, four hundred one".