221452540047170 has 32 divisors (see below), whose sum is σ = 405151991313840. Its totient is φ = 87128275933440.

The previous prime is 221452540047139. The next prime is 221452540047173. The reversal of 221452540047170 is 71740045254122.

It can be written as a sum of positive squares in 8 ways, for example, as 9190980545569 + 212261559501601 = 3031663^2 + 14569199^2 .

It is not an unprimeable number, because it can be changed into a prime (221452540047173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94681124 + ... + 96991856.

Almost surely, 2^{221452540047170} is an apocalyptic number.

221452540047170 is a deficient number, since it is larger than the sum of its proper divisors (183699451266670).

221452540047170 is a wasteful number, since it uses less digits than its factorization.

221452540047170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2467910.

The product of its (nonzero) digits is 627200, while the sum is 44.

The spelling of 221452540047170 in words is "two hundred twenty-one trillion, four hundred fifty-two billion, five hundred forty million, forty-seven thousand, one hundred seventy".