221631493373760 has 224 divisors, whose sum is σ = 712683667238400. Its totient is φ = 58345719644160.

The previous prime is 221631493373723. The next prime is 221631493373861. The reversal of 221631493373760 is 67373394136122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 221631493373760.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 571715676 + ... + 572103204.

Almost surely, 2^{221631493373760} is an apocalyptic number.

221631493373760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221631493373760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356341833619200).

221631493373760 is an abundant number, since it is smaller than the sum of its proper divisors (491052173864640).

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

221631493373760 is a wasteful number, since it uses less digits than its factorization.

221631493373760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395169 (or 395159 counting only the distinct ones).

The product of its (nonzero) digits is 20575296, while the sum is 57.

The spelling of 221631493373760 in words is "two hundred twenty-one trillion, six hundred thirty-one billion, four hundred ninety-three million, three hundred seventy-three thousand, seven hundred sixty".