215044145338 has 32 divisors (see below), whose sum is σ = 357715997568. Its totient is φ = 96129633600.

The previous prime is 215044145263. The next prime is 215044145339. The reversal of 215044145338 is 833541440512.

It is a self number, because there is not a number n which added to its sum of digits gives 215044145338.

It is not an unprimeable number, because it can be changed into a prime (215044145339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15140056 + ... + 15154252.

It is an arithmetic number, because the mean of its divisors is an integer number (11178624924).

Almost surely, 2^215044145338 is an apocalyptic number.

215044145338 is a deficient number, since it is larger than the sum of its proper divisors (142671852230).

215044145338 is a wasteful number, since it uses less digits than its factorization.

215044145338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25558.

The product of its (nonzero) digits is 230400, while the sum is 40.

The spelling of 215044145338 in words is "two hundred fifteen billion, forty-four million, one hundred forty-five thousand, three hundred thirty-eight".