221450035145 has 16 divisors (see below), whose sum is σ = 277396354128. Its totient is φ = 169546141440.

The previous prime is 221450035111. The next prime is 221450035159. The reversal of 221450035145 is 541530054122.

It can be written as a sum of positive squares in 8 ways, for example, as 33572866441 + 187877168704 = 183229^2 + 433448^2 .

It is not a de Polignac number, because 221450035145 - 2⁸ = 221450034889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9800414 + ... + 9822983.

It is an arithmetic number, because the mean of its divisors is an integer number (17337272133).

Almost surely, 2^221450035145 is an apocalyptic number.

It is an amenable number.

221450035145 is a deficient number, since it is larger than the sum of its proper divisors (55946318983).

221450035145 is a wasteful number, since it uses less digits than its factorization.

221450035145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19623500.

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 221450035145 its reverse (541530054122), we get a palindrome (762980089267).

The spelling of 221450035145 in words is "two hundred twenty-one billion, four hundred fifty million, thirty-five thousand, one hundred forty-five".