70220221 has 4 divisors (see below), whose sum is σ = 71268352. Its totient is φ = 69172092.

The previous prime is 70220201. The next prime is 70220231. The reversal of 70220221 is 12202207.

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.

It is a cyclic number.

It is not a de Polignac number, because 70220221 - 2¹³ = 70212029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70220195 and 70220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70220201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 523965 + ... + 524098.

It is an arithmetic number, because the mean of its divisors is an integer number (17817088).

Almost surely, 2^70220221 is an apocalyptic number.

It is an amenable number.

70220221 is a deficient number, since it is larger than the sum of its proper divisors (1048131).

70220221 is a wasteful number, since it uses less digits than its factorization.

70220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048130.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 70220221 is about 8379.7506526149. The cubic root of 70220221 is about 412.5602649630.

Adding to 70220221 its reverse (12202207), we get a palindrome (82422428).

The spelling of 70220221 in words is "seventy million, two hundred twenty thousand, two hundred twenty-one".