221095715 has 12 divisors (see below), whose sum is σ = 269909184. Its totient is φ = 173864976.

The previous prime is 221095703. The next prime is 221095733. The reversal of 221095715 is 517590122.

It is a happy number.

It is not a de Polignac number, because 221095715 - 2¹⁶ = 221030179 is a prime.

It is a super-2 number, since 2×221095715² = 97766630382722450, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11054 + ... + 23756.

It is an arithmetic number, because the mean of its divisors is an integer number (22492432).

Almost surely, 2^221095715 is an apocalyptic number.

221095715 is a deficient number, since it is larger than the sum of its proper divisors (48813469).

221095715 is an equidigital number, since it uses as much as digits as its factorization.

221095715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12826 (or 12767 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 221095715 is about 14869.2876426546. The cubic root of 221095715 is about 604.6816301847.

The spelling of 221095715 in words is "two hundred twenty-one million, ninety-five thousand, seven hundred fifteen".