215042044154 has 48 divisors (see below), whose sum is σ = 388804686336. Its totient is φ = 88848496800.

The previous prime is 215042044103. The next prime is 215042044157. The reversal of 215042044154 is 451440240512.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 215042044154.

It is not an unprimeable number, because it can be changed into a prime (215042044157) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 664424 + ... + 933564.

It is an arithmetic number, because the mean of its divisors is an integer number (8100097632).

Almost surely, 2^215042044154 is an apocalyptic number.

215042044154 is a deficient number, since it is larger than the sum of its proper divisors (173762642182).

215042044154 is a wasteful number, since it uses less digits than its factorization.

215042044154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269451 (or 269444 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 32.

Adding to 215042044154 its reverse (451440240512), we get a palindrome (666482284666).

The spelling of 215042044154 in words is "two hundred fifteen billion, forty-two million, forty-four thousand, one hundred fifty-four".