221535201214254 has 32 divisors (see below), whose sum is σ = 445608932065920. Its totient is φ = 73422095976992.

The previous prime is 221535201214207. The next prime is 221535201214303. The reversal of 221535201214254 is 452412102535122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7079517 + ... + 22207880.

It is an arithmetic number, because the mean of its divisors is an integer number (13925279127060).

Almost surely, 2^{221535201214254} is an apocalyptic number.

221535201214254 is an abundant number, since it is smaller than the sum of its proper divisors (224073730851666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221535201214254 is a wasteful number, since it uses less digits than its factorization.

221535201214254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29294624.

The product of its (nonzero) digits is 192000, while the sum is 39.

Adding to 221535201214254 its reverse (452412102535122), we get a palindrome (673947303749376).

The spelling of 221535201214254 in words is "two hundred twenty-one trillion, five hundred thirty-five billion, two hundred one million, two hundred fourteen thousand, two hundred fifty-four".