215104422440 has 48 divisors (see below), whose sum is σ = 514129369500. Its totient is φ = 80980484096.

The previous prime is 215104422413. The next prime is 215104422451. The reversal of 215104422440 is 44224401512.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 202163539876 + 12940882564 = 449626^2 + 113758^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9292265 + ... + 9315384.

Almost surely, 2^215104422440 is an apocalyptic number.

215104422440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215104422440 is an abundant number, since it is smaller than the sum of its proper divisors (299024947060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215104422440 is a wasteful number, since it uses less digits than its factorization.

215104422440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18607694 (or 18607673 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 29.

Adding to 215104422440 its reverse (44224401512), we get a palindrome (259328823952).

The spelling of 215104422440 in words is "two hundred fifteen billion, one hundred four million, four hundred twenty-two thousand, four hundred forty".