221625165621244 has 48 divisors (see below), whose sum is σ = 483566158333440. Its totient is φ = 86343834548160.

The previous prime is 221625165621191. The next prime is 221625165621247. The reversal of 221625165621244 is 442126561526122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221625165621247) 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, 7796832 + ... + 22450855.

It is an arithmetic number, because the mean of its divisors is an integer number (10074294965280).

Almost surely, 2^{221625165621244} is an apocalyptic number.

It is an amenable number.

221625165621244 is an abundant number, since it is smaller than the sum of its proper divisors (261940992712196).

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

221625165621244 is a wasteful number, since it uses less digits than its factorization.

221625165621244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30271498 (or 30271496 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 49.

The spelling of 221625165621244 in words is "two hundred twenty-one trillion, six hundred twenty-five billion, one hundred sixty-five million, six hundred twenty-one thousand, two hundred forty-four".