221282495 has 16 divisors (see below), whose sum is σ = 313264128. Its totient is φ = 146841120.

The previous prime is 221282447. The next prime is 221282513. The reversal of 221282495 is 594282122.

It is a happy number.

It is not a de Polignac number, because 221282495 - 2⁶ = 221282431 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100889 + ... + 103058.

It is an arithmetic number, because the mean of its divisors is an integer number (19579008).

Almost surely, 2^221282495 is an apocalyptic number.

221282495 is a deficient number, since it is larger than the sum of its proper divisors (91981633).

221282495 is a wasteful number, since it uses less digits than its factorization.

221282495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203990.

The product of its digits is 23040, while the sum is 35.

The square root of 221282495 is about 14875.5670480153. The cubic root of 221282495 is about 604.8518590914.

The spelling of 221282495 in words is "two hundred twenty-one million, two hundred eighty-two thousand, four hundred ninety-five".