221407082 has 16 divisors (see below), whose sum is σ = 378697032. Its totient is φ = 96176640.

The previous prime is 221407037. The next prime is 221407127. The reversal of 221407082 is 280704122.

It is an interprime number because it is at equal distance from previous prime (221407037) and next prime (221407127).

It can be written as a sum of positive squares in 4 ways, for example, as 187662601 + 33744481 = 13699^2 + 5809^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250019 + ... + 250902.

Almost surely, 2^221407082 is an apocalyptic number.

221407082 is a deficient number, since it is larger than the sum of its proper divisors (157289950).

221407082 is a wasteful number, since it uses less digits than its factorization.

221407082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500953.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 221407082 is about 14879.7540974305. The cubic root of 221407082 is about 604.9653528414.

The spelling of 221407082 in words is "two hundred twenty-one million, four hundred seven thousand, eighty-two".