221246443260 has 72 divisors (see below), whose sum is σ = 671622968016. Its totient is φ = 58954325760.

The previous prime is 221246443259. The next prime is 221246443261. The reversal of 221246443260 is 62344642122.

221246443260 is a `hidden beast` number, since 2 + 2 + 1 + 2 + 4 + 644 + 3 + 2 + 6 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (221246443259) and next prime (221246443261).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221246443261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 227454 + ... + 703013.

It is an arithmetic number, because the mean of its divisors is an integer number (9328096778).

Almost surely, 2^221246443260 is an apocalyptic number.

221246443260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221246443260 is an abundant number, since it is smaller than the sum of its proper divisors (450376524756).

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

221246443260 is a wasteful number, since it uses less digits than its factorization.

221246443260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931803 (or 931798 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The spelling of 221246443260 in words is "two hundred twenty-one billion, two hundred forty-six million, four hundred forty-three thousand, two hundred sixty".