221115597 has 8 divisors (see below), whose sum is σ = 310337760. Its totient is φ = 139651920.

The previous prime is 221115577. The next prime is 221115599. The reversal of 221115597 is 795511122.

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

It is not a de Polignac number, because 221115597 - 2⁶ = 221115533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221115599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1939554 + ... + 1939667.

It is an arithmetic number, because the mean of its divisors is an integer number (38792220).

Almost surely, 2^221115597 is an apocalyptic number.

It is an amenable number.

221115597 is a deficient number, since it is larger than the sum of its proper divisors (89222163).

221115597 is a wasteful number, since it uses less digits than its factorization.

221115597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3879243.

The product of its digits is 6300, while the sum is 33.

The square root of 221115597 is about 14869.9561868891. The cubic root of 221115597 is about 604.6997549440.

The spelling of 221115597 in words is "two hundred twenty-one million, one hundred fifteen thousand, five hundred ninety-seven".