215222013445 has 8 divisors (see below), whose sum is σ = 266597591040. Its totient is φ = 166623494160.

The previous prime is 215222013403. The next prime is 215222013473. The reversal of 215222013445 is 544310222512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 215222013445 - 2³³ = 206632078853 is a prime.

It is a super-4 number, since 4×215222013445⁴ (a number of 46 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 694264405 + ... + 694264714.

It is an arithmetic number, because the mean of its divisors is an integer number (33324698880).

Almost surely, 2^215222013445 is an apocalyptic number.

It is an amenable number.

215222013445 is a deficient number, since it is larger than the sum of its proper divisors (51375577595).

215222013445 is a wasteful number, since it uses less digits than its factorization.

215222013445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388529155.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 215222013445 its reverse (544310222512), we get a palindrome (759532235957).

The spelling of 215222013445 in words is "two hundred fifteen billion, two hundred twenty-two million, thirteen thousand, four hundred forty-five".