70448221 has 8 divisors (see below), whose sum is σ = 77164920. Its totient is φ = 64017408.

The previous prime is 70448197. The next prime is 70448227. The reversal of 70448221 is 12284407.

It can be written as a sum of positive squares in 4 ways, for example, as 39200121 + 31248100 = 6261^2 + 5590^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 70448221 - 2⁹ = 70447709 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 70448221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70448227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70956 + ... + 71941.

It is an arithmetic number, because the mean of its divisors is an integer number (9645615).

Almost surely, 2^70448221 is an apocalyptic number.

It is an amenable number.

70448221 is a deficient number, since it is larger than the sum of its proper divisors (6716699).

70448221 is a wasteful number, since it uses less digits than its factorization.

70448221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142943.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 70448221 is about 8393.3438509333. The cubic root of 70448221 is about 413.0063003844.

The spelling of 70448221 in words is "seventy million, four hundred forty-eight thousand, two hundred twenty-one".