221742488 has 16 divisors (see below), whose sum is σ = 453564360. Its totient is φ = 100792000.

The previous prime is 221742487. The next prime is 221742539. The reversal of 221742488 is 884247122.

221742488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221742481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1259813 + ... + 1259988.

Almost surely, 2^221742488 is an apocalyptic number.

It is an amenable number.

221742488 is an abundant number, since it is smaller than the sum of its proper divisors (231821872).

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

221742488 is a wasteful number, since it uses less digits than its factorization.

221742488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2519818 (or 2519814 counting only the distinct ones).

The product of its digits is 57344, while the sum is 38.

The square root of 221742488 is about 14891.0203814245. The cubic root of 221742488 is about 605.2706827827.

The spelling of 221742488 in words is "two hundred twenty-one million, seven hundred forty-two thousand, four hundred eighty-eight".