215302778042 has 24 divisors (see below), whose sum is σ = 359259612768. Its totient is φ = 96685794920.

The previous prime is 215302778023. The next prime is 215302778063. The reversal of 215302778042 is 240877203512.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 5339438 + ... + 5379609.

It is an arithmetic number, because the mean of its divisors is an integer number (14969150532).

Almost surely, 2^215302778042 is an apocalyptic number.

215302778042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

215302778042 is a deficient number, since it is larger than the sum of its proper divisors (143956834726).

215302778042 is a wasteful number, since it uses less digits than its factorization.

215302778042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10719154 (or 10719143 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 41.

The spelling of 215302778042 in words is "two hundred fifteen billion, three hundred two million, seven hundred seventy-eight thousand, forty-two".