70444221 has 8 divisors (see below), whose sum is σ = 95114880. Its totient is φ = 46368192.

The previous prime is 70444217. The next prime is 70444223. The reversal of 70444221 is 12244407.

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

It is not a de Polignac number, because 70444221 - 2² = 70444217 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 70444191 and 70444200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70444223) 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, 148380 + ... + 148853.

It is an arithmetic number, because the mean of its divisors is an integer number (11889360).

Almost surely, 2^70444221 is an apocalyptic number.

It is an amenable number.

70444221 is a deficient number, since it is larger than the sum of its proper divisors (24670659).

70444221 is a wasteful number, since it uses less digits than its factorization.

70444221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297315.

The product of its (nonzero) digits is 1792, while the sum is 24.

The square root of 70444221 is about 8393.1055634967. The cubic root of 70444221 is about 412.9984835016.

Adding to 70444221 its reverse (12244407), we get a palindrome (82688628).

The spelling of 70444221 in words is "seventy million, four hundred forty-four thousand, two hundred twenty-one".