70221611 has 4 divisors (see below), whose sum is σ = 74352312. Its totient is φ = 66090912.

The previous prime is 70221607. The next prime is 70221617. The reversal of 70221611 is 11612207.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11612207 = 17 ⋅683071.

It is a cyclic number.

It is not a de Polignac number, because 70221611 - 2² = 70221607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70221617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2065325 + ... + 2065358.

It is an arithmetic number, because the mean of its divisors is an integer number (18588078).

Almost surely, 2^70221611 is an apocalyptic number.

70221611 is a deficient number, since it is larger than the sum of its proper divisors (4130701).

70221611 is a wasteful number, since it uses less digits than its factorization.

70221611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4130700.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 70221611 is about 8379.8335902332. The cubic root of 70221611 is about 412.5629871371.

Adding to 70221611 its reverse (11612207), we get a palindrome (81833818).

The spelling of 70221611 in words is "seventy million, two hundred twenty-one thousand, six hundred eleven".