215420115554 has 8 divisors (see below), whose sum is σ = 369291626688. Its totient is φ = 92322906660.

The previous prime is 215420115503. The next prime is 215420115587. The reversal of 215420115554 is 455511024512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 7693575542 + ... + 7693575569.

It is an arithmetic number, because the mean of its divisors is an integer number (46161453336).

Almost surely, 2^215420115554 is an apocalyptic number.

215420115554 is a deficient number, since it is larger than the sum of its proper divisors (153871511134).

215420115554 is a wasteful number, since it uses less digits than its factorization.

215420115554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15387151120.

The product of its (nonzero) digits is 40000, while the sum is 35.

The spelling of 215420115554 in words is "two hundred fifteen billion, four hundred twenty million, one hundred fifteen thousand, five hundred fifty-four".