70221863 has 4 divisors (see below), whose sum is σ = 70446528. Its totient is φ = 69997200.

The previous prime is 70221841. The next prime is 70221869. The reversal of 70221863 is 36812207.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 70221863 - 2⁸ = 70221607 is a prime.

It is a super-2 number, since 2×70221863² = 9862220086381538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70221869) 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 3 ways as a sum of consecutive naturals, for example, 111863 + ... + 112488.

It is an arithmetic number, because the mean of its divisors is an integer number (17611632).

Almost surely, 2^70221863 is an apocalyptic number.

70221863 is a deficient number, since it is larger than the sum of its proper divisors (224665).

70221863 is a wasteful number, since it uses less digits than its factorization.

70221863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224664.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 70221863 is about 8379.8486263178. The cubic root of 70221863 is about 412.5634806496.

The spelling of 70221863 in words is "seventy million, two hundred twenty-one thousand, eight hundred sixty-three".