221462477604 has 81 divisors (see below), whose sum is σ = 574094904019. Its totient is φ = 71982670080.

The previous prime is 221462477573. The next prime is 221462477609. The reversal of 221462477604 is 406774264122.

The square root of 221462477604 is 470598.

It is a perfect power (a square), and thus also a powerful number.

221462477604 is a `hidden beast` number, since 2 + 2 + 14 + 6 + 24 + 7 + 7 + 604 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4723812900 + 216738664704 = 68730^2 + 465552^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221462477604.

It is not an unprimeable number, because it can be changed into a prime (221462477609) 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, 115766152 + ... + 115768064.

Almost surely, 2^221462477604 is an apocalyptic number.

221462477604 is the 470598-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221462477604

221462477604 is an abundant number, since it is smaller than the sum of its proper divisors (352632426415).

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

221462477604 is an equidigital number, since it uses as much as digits as its factorization.

221462477604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3918 (or 1959 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 45.

The spelling of 221462477604 in words is "two hundred twenty-one billion, four hundred sixty-two million, four hundred seventy-seven thousand, six hundred four".