221346590 has 8 divisors (see below), whose sum is σ = 398423880. Its totient is φ = 88538632.

The previous prime is 221346571. The next prime is 221346611. The reversal of 221346590 is 95643122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 11067320 + ... + 11067339.

It is an arithmetic number, because the mean of its divisors is an integer number (49802985).

Almost surely, 2^221346590 is an apocalyptic number.

221346590 is a deficient number, since it is larger than the sum of its proper divisors (177077290).

221346590 is a wasteful number, since it uses less digits than its factorization.

221346590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22134666.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 221346590 is about 14877.7212636882. The cubic root of 221346590 is about 604.9102523794.

The spelling of 221346590 in words is "two hundred twenty-one million, three hundred forty-six thousand, five hundred ninety".