70333221 has 8 divisors (see below), whose sum is σ = 107174464. Its totient is φ = 40190400.

The previous prime is 70333213. The next prime is 70333223. The reversal of 70333221 is 12233307.

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

It is not a de Polignac number, because 70333221 - 2³ = 70333213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 3349201 = 70333221 / (7 + 0 + 3 + 3 + 3 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70333223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1674580 + ... + 1674621.

It is an arithmetic number, because the mean of its divisors is an integer number (13396808).

Almost surely, 2^70333221 is an apocalyptic number.

It is an amenable number.

70333221 is a deficient number, since it is larger than the sum of its proper divisors (36841243).

70333221 is a wasteful number, since it uses less digits than its factorization.

70333221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3349211.

The product of its (nonzero) digits is 756, while the sum is 21.

The square root of 70333221 is about 8386.4903863297. The cubic root of 70333221 is about 412.7814468612.

Adding to 70333221 its reverse (12233307), we get a palindrome (82566528).

The spelling of 70333221 in words is "seventy million, three hundred thirty-three thousand, two hundred twenty-one".