221151694895 has 16 divisors (see below), whose sum is σ = 272912848128. Its totient is φ = 171913386240.

The previous prime is 221151694873. The next prime is 221151694901. The reversal of 221151694895 is 598496151122.

It is not a de Polignac number, because 221151694895 - 2²⁶ = 221084586031 is a prime.

It is a super-2 number, since 2×221151694895² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 644639 + ... + 926208.

It is an arithmetic number, because the mean of its divisors is an integer number (17057053008).

Almost surely, 2^221151694895 is an apocalyptic number.

221151694895 is a deficient number, since it is larger than the sum of its proper divisors (51761153233).

221151694895 is a wasteful number, since it uses less digits than its factorization.

221151694895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571650.

The product of its digits is 1555200, while the sum is 53.

The spelling of 221151694895 in words is "two hundred twenty-one billion, one hundred fifty-one million, six hundred ninety-four thousand, eight hundred ninety-five".