70286221 has 4 divisors (see below), whose sum is σ = 71176000. Its totient is φ = 69396444.

The previous prime is 70286201. The next prime is 70286233. The reversal of 70286221 is 12268207.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12268207 = 7 ⋅1752601.

It is not a de Polignac number, because 70286221 - 2⁵ = 70286189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70286221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70286201) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 444771 + ... + 444928.

It is an arithmetic number, because the mean of its divisors is an integer number (17794000).

Almost surely, 2^70286221 is an apocalyptic number.

It is an amenable number.

70286221 is a deficient number, since it is larger than the sum of its proper divisors (889779).

70286221 is an equidigital number, since it uses as much as digits as its factorization.

70286221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889778.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 70286221 is about 8383.6877923740. The cubic root of 70286221 is about 412.6894796475.

It can be divided in two parts, 70286 and 221, that added together give a palindrome (70507).

The spelling of 70286221 in words is "seventy million, two hundred eighty-six thousand, two hundred twenty-one".