70344221 has 4 divisors (see below), whose sum is σ = 70366332. Its totient is φ = 70322112.

The previous prime is 70344217. The next prime is 70344223. The reversal of 70344221 is 12244307.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51638596 + 18705625 = 7186^2 + 4325^2 .

It is a cyclic number.

It is not a de Polignac number, because 70344221 - 2² = 70344217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70344223) 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, 5276 + ... + 12981.

It is an arithmetic number, because the mean of its divisors is an integer number (17591583).

Almost surely, 2^70344221 is an apocalyptic number.

It is an amenable number.

70344221 is a deficient number, since it is larger than the sum of its proper divisors (22111).

70344221 is a wasteful number, since it uses less digits than its factorization.

70344221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22110.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 70344221 is about 8387.1461773359. The cubic root of 70344221 is about 412.8029651857.

Adding to 70344221 its reverse (12244307), we get a palindrome (82588528).

The spelling of 70344221 in words is "seventy million, three hundred forty-four thousand, two hundred twenty-one".