221292086450 has 54 divisors (see below), whose sum is σ = 417928188663. Its totient is φ = 87176980800.

The previous prime is 221292086441. The next prime is 221292086453. The reversal of 221292086450 is 54680292122.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 1772662609 + 219519423841 = 42103^2 + 468529^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332635.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221292086398 and 221292086407.

It is not an unprimeable number, because it can be changed into a prime (221292086453) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 236170382 + ... + 236171318.

Almost surely, 2^221292086450 is an apocalyptic number.

221292086450 is a deficient number, since it is larger than the sum of its proper divisors (196636102213).

221292086450 is an frugal number, since it uses more digits than its factorization.

221292086450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028 (or 1015 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 221292086450 in words is "two hundred twenty-one billion, two hundred ninety-two million, eighty-six thousand, four hundred fifty".