215343240445 has 16 divisors (see below), whose sum is σ = 260128132992. Its totient is φ = 171134215360.

The previous prime is 215343240407. The next prime is 215343240457. The reversal of 215343240445 is 544042343512.

It is a de Polignac number, because none of the positive numbers 2^k-215343240445 is a prime.

It is a super-2 number, since 2×215343240445² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219294 + ... + 691936.

It is an arithmetic number, because the mean of its divisors is an integer number (16258008312).

Almost surely, 2^215343240445 is an apocalyptic number.

It is an amenable number.

215343240445 is a deficient number, since it is larger than the sum of its proper divisors (44784892547).

215343240445 is a wasteful number, since it uses less digits than its factorization.

215343240445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473252.

The product of its (nonzero) digits is 230400, while the sum is 37.

Adding to 215343240445 its reverse (544042343512), we get a palindrome (759385583957).

The spelling of 215343240445 in words is "two hundred fifteen billion, three hundred forty-three million, two hundred forty thousand, four hundred forty-five".