221395802 has 8 divisors (see below), whose sum is σ = 343545300. Its totient is φ = 106880704.

The previous prime is 221395799. The next prime is 221395843. The reversal of 221395802 is 208593122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 191573281 + 29822521 = 13841^2 + 5461^2 .

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

It is a super-2 number, since 2×221395802² = 98032202286446408, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1908527 + ... + 1908642.

Almost surely, 2^221395802 is an apocalyptic number.

221395802 is a deficient number, since it is larger than the sum of its proper divisors (122149498).

221395802 is a wasteful number, since it uses less digits than its factorization.

221395802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3817200.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 221395802 is about 14879.3750540807. The cubic root of 221395802 is about 604.9550789678.

The spelling of 221395802 in words is "two hundred twenty-one million, three hundred ninety-five thousand, eight hundred two".