70022221 has 2 divisors, whose sum is σ = 70022222. Its totient is φ = 70022220.

The previous prime is 70022177. The next prime is 70022231. The reversal of 70022221 is 12222007.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43705321 + 26316900 = 6611^2 + 5130^2 .

It is a cyclic number.

It is not a de Polignac number, because 70022221 - 2¹³ = 70014029 is a prime.

It is a super-2 number, since 2×70022221² = 9806222867545682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 70022195 and 70022204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70022231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35011110 + 35011111.

It is an arithmetic number, because the mean of its divisors is an integer number (35011111).

Almost surely, 2^70022221 is an apocalyptic number.

It is an amenable number.

70022221 is a deficient number, since it is larger than the sum of its proper divisors (1).

70022221 is an equidigital number, since it uses as much as digits as its factorization.

70022221 is an evil number, because the sum of its binary digits is even.

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

The square root of 70022221 is about 8367.9281187161. The cubic root of 70022221 is about 412.1721344532.

Adding to 70022221 its reverse (12222007), we get a palindrome (82244228).

The spelling of 70022221 in words is "seventy million, twenty-two thousand, two hundred twenty-one".