221534410043157 has 16 divisors (see below), whose sum is σ = 295944010806720. Its totient is φ = 147407242694400.

The previous prime is 221534410043131. The next prime is 221534410043173. The reversal of 221534410043157 is 751340014435122.

It is a happy number.

It is not a de Polignac number, because 221534410043157 - 2⁷ = 221534410043029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221534410043057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21249894 + ... + 29910312.

It is an arithmetic number, because the mean of its divisors is an integer number (18496500675420).

Almost surely, 2^{221534410043157} is an apocalyptic number.

It is an amenable number.

221534410043157 is a deficient number, since it is larger than the sum of its proper divisors (74409600763563).

221534410043157 is a wasteful number, since it uses less digits than its factorization.

221534410043157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8676724.

The product of its (nonzero) digits is 403200, while the sum is 42.

Adding to 221534410043157 its reverse (751340014435122), we get a palindrome (972874424478279).

The spelling of 221534410043157 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, four hundred ten million, forty-three thousand, one hundred fifty-seven".