221534404132640 has 96 divisors (see below), whose sum is σ = 523760496465024. Its totient is φ = 88548517396480.

The previous prime is 221534404132579. The next prime is 221534404132759. The reversal of 221534404132640 is 46231404435122.

It is an unprimeable number.

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, 1486164992 + ... + 1486314048.

It is an arithmetic number, because the mean of its divisors is an integer number (5455838504844).

Almost surely, 2^{221534404132640} is an apocalyptic number.

221534404132640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221534404132640 is an abundant number, since it is smaller than the sum of its proper divisors (302226092332384).

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

221534404132640 is a wasteful number, since it uses less digits than its factorization.

221534404132640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155850 (or 155842 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 41.

Adding to 221534404132640 its reverse (46231404435122), we get a palindrome (267765808567762).

The spelling of 221534404132640 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, four hundred four million, one hundred thirty-two thousand, six hundred forty".