221420748 has 24 divisors (see below), whose sum is σ = 521667328. Its totient is φ = 73089936.

The previous prime is 221420741. The next prime is 221420779. The reversal of 221420748 is 847024122.

221420748 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221420741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88336 + ... + 90807.

Almost surely, 2^221420748 is an apocalyptic number.

It is an amenable number.

221420748 is an abundant number, since it is smaller than the sum of its proper divisors (300246580).

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

221420748 is a wasteful number, since it uses less digits than its factorization.

221420748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179253 (or 179251 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 221420748 is about 14880.2133049227. The cubic root of 221420748 is about 604.9777994267.

The spelling of 221420748 in words is "two hundred twenty-one million, four hundred twenty thousand, seven hundred forty-eight".