221903013 has 8 divisors (see below), whose sum is σ = 296107488. Its totient is φ = 147816944.

The previous prime is 221903009. The next prime is 221903039. The reversal of 221903013 is 310309122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 221903013 - 2² = 221903009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221903083) 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, 25131 + ... + 32792.

It is an arithmetic number, because the mean of its divisors is an integer number (37013436).

Almost surely, 2^221903013 is an apocalyptic number.

It is an amenable number.

221903013 is a deficient number, since it is larger than the sum of its proper divisors (74204475).

221903013 is a wasteful number, since it uses less digits than its factorization.

221903013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59203.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 221903013 is about 14896.4093995835. The cubic root of 221903013 is about 605.4167044749.

The spelling of 221903013 in words is "two hundred twenty-one million, nine hundred three thousand, thirteen".