221492847090 has 32 divisors (see below), whose sum is σ = 531597660480. Its totient is φ = 59063111744.

The previous prime is 221492847067. The next prime is 221492847091. The reversal of 221492847090 is 90748294122.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221492847091) 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, 1307017 + ... + 1466723.

It is an arithmetic number, because the mean of its divisors is an integer number (16612426890).

Almost surely, 2^221492847090 is an apocalyptic number.

221492847090 is an abundant number, since it is smaller than the sum of its proper divisors (310104813390).

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

221492847090 is a wasteful number, since it uses less digits than its factorization.

221492847090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205946.

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 221492847090 in words is "two hundred twenty-one billion, four hundred ninety-two million, eight hundred forty-seven thousand, ninety".