221352320154 has 64 divisors (see below), whose sum is σ = 528790752000. Its totient is φ = 60433164288.

The previous prime is 221352320153. The next prime is 221352320159. The reversal of 221352320154 is 451023253122.

It is not an unprimeable number, because it can be changed into a prime (221352320153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 818629 + ... + 1054920.

It is an arithmetic number, because the mean of its divisors is an integer number (8262355500).

Almost surely, 2^221352320154 is an apocalyptic number.

221352320154 is an abundant number, since it is smaller than the sum of its proper divisors (307438431846).

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

221352320154 is a wasteful number, since it uses less digits than its factorization.

221352320154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873687.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 221352320154 its reverse (451023253122), we get a palindrome (672375573276).

The spelling of 221352320154 in words is "two hundred twenty-one billion, three hundred fifty-two million, three hundred twenty thousand, one hundred fifty-four".