221086748 has 12 divisors (see below), whose sum is σ = 387444960. Its totient is φ = 110388192.

The previous prime is 221086709. The next prime is 221086757. The reversal of 221086748 is 847680122.

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, 35561 + ... + 41312.

It is an arithmetic number, because the mean of its divisors is an integer number (32287080).

Almost surely, 2^221086748 is an apocalyptic number.

It is an amenable number.

221086748 is a deficient number, since it is larger than the sum of its proper divisors (166358212).

221086748 is a wasteful number, since it uses less digits than its factorization.

221086748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77596 (or 77594 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 221086748 is about 14868.9861120387. The cubic root of 221086748 is about 604.6734553640.

The spelling of 221086748 in words is "two hundred twenty-one million, eighty-six thousand, seven hundred forty-eight".