70145218 has 32 divisors (see below), whose sum is σ = 125737920. Its totient is φ = 28925760.

The previous prime is 70145203. The next prime is 70145227. The reversal of 70145218 is 81254107.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 14796 + ... + 18952.

It is an arithmetic number, because the mean of its divisors is an integer number (3929310).

Almost surely, 2^70145218 is an apocalyptic number.

70145218 is a deficient number, since it is larger than the sum of its proper divisors (55592702).

70145218 is a wasteful number, since it uses less digits than its factorization.

70145218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4242.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 70145218 is about 8375.2742044664. The cubic root of 70145218 is about 412.4133258971.

Subtracting 70145218 from its reverse (81254107), we obtain a square (11108889 = 3333²).

The spelling of 70145218 in words is "seventy million, one hundred forty-five thousand, two hundred eighteen".