221572474940 has 12 divisors (see below), whose sum is σ = 465302197416. Its totient is φ = 88628989968.

The previous prime is 221572474909. The next prime is 221572474957. The reversal of 221572474940 is 49474275122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5539311854 + ... + 5539311893.

It is an arithmetic number, because the mean of its divisors is an integer number (38775183118).

Almost surely, 2^221572474940 is an apocalyptic number.

221572474940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221572474940 is an abundant number, since it is smaller than the sum of its proper divisors (243729722476).

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

221572474940 is a wasteful number, since it uses less digits than its factorization.

221572474940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11078623756 (or 11078623754 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 47.

The spelling of 221572474940 in words is "two hundred twenty-one billion, five hundred seventy-two million, four hundred seventy-four thousand, nine hundred forty".