215042036421 has 16 divisors (see below), whose sum is σ = 287635609664. Its totient is φ = 142905095424.

The previous prime is 215042036351. The next prime is 215042036477. The reversal of 215042036421 is 124630240512.

It is not a de Polignac number, because 215042036421 - 2⁹ = 215042035909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215042536421) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5264151 + ... + 5304843.

It is an arithmetic number, because the mean of its divisors is an integer number (17977225604).

Almost surely, 2^215042036421 is an apocalyptic number.

It is an amenable number.

215042036421 is a deficient number, since it is larger than the sum of its proper divisors (72593573243).

215042036421 is a wasteful number, since it uses less digits than its factorization.

215042036421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46260.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 215042036421 its reverse (124630240512), we get a palindrome (339672276933).

The spelling of 215042036421 in words is "two hundred fifteen billion, forty-two million, thirty-six thousand, four hundred twenty-one".