221655567555157 has 8 divisors (see below), whose sum is σ = 233322193488800. Its totient is φ = 209988995964624.

The previous prime is 221655567555139. The next prime is 221655567555161. The reversal of 221655567555157 is 751555765556122.

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

It is a cyclic number.

It is not a de Polignac number, because 221655567555157 - 2⁷ = 221655567555029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221655567555092 and 221655567555101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221655567555557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5076807 + ... + 21658372.

It is an arithmetic number, because the mean of its divisors is an integer number (29165274186100).

Almost surely, 2^{221655567555157} is an apocalyptic number.

It is an amenable number.

221655567555157 is a deficient number, since it is larger than the sum of its proper divisors (11666625933643).

221655567555157 is a wasteful number, since it uses less digits than its factorization.

221655567555157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27171555.

The product of its digits is 551250000, while the sum is 67.

The spelling of 221655567555157 in words is "two hundred twenty-one trillion, six hundred fifty-five billion, five hundred sixty-seven million, five hundred fifty-five thousand, one hundred fifty-seven".