221155048378 has 32 divisors (see below), whose sum is σ = 378261747072. Its totient is φ = 95992089600.

The previous prime is 221155048357. The next prime is 221155048393. The reversal of 221155048378 is 873840551122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68463 + ... + 668578.

It is an arithmetic number, because the mean of its divisors is an integer number (11820679596).

Almost surely, 2^221155048378 is an apocalyptic number.

221155048378 is a deficient number, since it is larger than the sum of its proper divisors (157106698694).

221155048378 is a wasteful number, since it uses less digits than its factorization.

221155048378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737670.

The product of its (nonzero) digits is 537600, while the sum is 46.

The spelling of 221155048378 in words is "two hundred twenty-one billion, one hundred fifty-five million, forty-eight thousand, three hundred seventy-eight".