221553445705157 has 16 divisors (see below), whose sum is σ = 230012962502400. Its totient is φ = 213148605640320.

The previous prime is 221553445705147. The next prime is 221553445705169. The reversal of 221553445705157 is 751507544355122.

It is a cyclic number.

It is not a de Polignac number, because 221553445705157 - 2³² = 221549150737861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221553445705147) 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, 525945944 + ... + 526367022.

It is an arithmetic number, because the mean of its divisors is an integer number (14375810156400).

Almost surely, 2^{221553445705157} is an apocalyptic number.

It is an amenable number.

221553445705157 is a deficient number, since it is larger than the sum of its proper divisors (8459516797243).

221553445705157 is a wasteful number, since it uses less digits than its factorization.

221553445705157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485956.

The product of its (nonzero) digits is 29400000, while the sum is 56.

The spelling of 221553445705157 in words is "two hundred twenty-one trillion, five hundred fifty-three billion, four hundred forty-five million, seven hundred five thousand, one hundred fifty-seven".