221432747403501 has 12 divisors (see below), whose sum is σ = 320163044465628. Its totient is φ = 147476104220544.

The previous prime is 221432747403409. The next prime is 221432747403509. The reversal of 221432747403501 is 105304747234122.

It is a happy number.

221432747403501 is a `hidden beast` number, since 2 + 2 + 1 + 4 + 3 + 2 + 74 + 74 + 0 + 3 + 501 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15970653468900 + 205462093934601 = 3996330^2 + 14333949^2 .

It is not a de Polignac number, because 221432747403501 - 2⁹ = 221432747402989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221432747403509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12143938860 + ... + 12143957093.

It is an arithmetic number, because the mean of its divisors is an integer number (26680253705469).

Almost surely, 2^{221432747403501} is an apocalyptic number.

It is an amenable number.

221432747403501 is a deficient number, since it is larger than the sum of its proper divisors (98730297062127).

221432747403501 is a wasteful number, since it uses less digits than its factorization.

221432747403501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24287896972 (or 24287896969 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 45.

The spelling of 221432747403501 in words is "two hundred twenty-one trillion, four hundred thirty-two billion, seven hundred forty-seven million, four hundred three thousand, five hundred one".