215942414444 has 24 divisors (see below), whose sum is σ = 397434605568. Its totient is φ = 102463598160.

The previous prime is 215942414431. The next prime is 215942414449. The reversal of 215942414444 is 444414249512.

It is a super-2 number, since 2×215942414444² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 215942414395 and 215942414404.

It is not an unprimeable number, because it can be changed into a prime (215942414449) by changing a digit.

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, 9229262 + ... + 9252629.

It is an arithmetic number, because the mean of its divisors is an integer number (16559775232).

Almost surely, 2^215942414444 is an apocalyptic number.

It is an amenable number.

215942414444 is a deficient number, since it is larger than the sum of its proper divisors (181492191124).

215942414444 is a wasteful number, since it uses less digits than its factorization.

215942414444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18482045 (or 18482043 counting only the distinct ones).

The product of its digits is 737280, while the sum is 44.

The spelling of 215942414444 in words is "two hundred fifteen billion, nine hundred forty-two million, four hundred fourteen thousand, four hundred forty-four".