221155814903 has 16 divisors (see below), whose sum is σ = 225309000576. Its totient is φ = 217034588160.

The previous prime is 221155814797. The next prime is 221155814909. The reversal of 221155814903 is 309418551122.

It is a cyclic number.

It is not a de Polignac number, because 221155814903 - 2³⁶ = 152436338167 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 (221155814909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23341175 + ... + 23350647.

It is an arithmetic number, because the mean of its divisors is an integer number (14081812536).

Almost surely, 2^221155814903 is an apocalyptic number.

221155814903 is a deficient number, since it is larger than the sum of its proper divisors (4153185673).

221155814903 is a wasteful number, since it uses less digits than its factorization.

221155814903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11114.

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 221155814903 in words is "two hundred twenty-one billion, one hundred fifty-five million, eight hundred fourteen thousand, nine hundred three".