70221579 has 4 divisors (see below), whose sum is σ = 93628776. Its totient is φ = 46814384.

The previous prime is 70221539. The next prime is 70221581. The reversal of 70221579 is 97512207.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70221579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70221539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11703594 + ... + 11703599.

It is an arithmetic number, because the mean of its divisors is an integer number (23407194).

Almost surely, 2^70221579 is an apocalyptic number.

70221579 is a deficient number, since it is larger than the sum of its proper divisors (23407197).

70221579 is a wasteful number, since it uses less digits than its factorization.

70221579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23407196.

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 70221579 is about 8379.8316808872. The cubic root of 70221579 is about 412.5629244687.

The spelling of 70221579 in words is "seventy million, two hundred twenty-one thousand, five hundred seventy-nine".