220812506 has 8 divisors (see below), whose sum is σ = 331988544. Its totient is φ = 110149660.

The previous prime is 220812499. The next prime is 220812551. The reversal of 220812506 is 605218022.

220812506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127220 + ... + 128943.

It is an arithmetic number, because the mean of its divisors is an integer number (41498568).

Almost surely, 2^220812506 is an apocalyptic number.

220812506 is a deficient number, since it is larger than the sum of its proper divisors (111176038).

220812506 is a wasteful number, since it uses less digits than its factorization.

220812506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256596.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 220812506 is about 14859.7613036011. The cubic root of 220812506 is about 604.4233341304.

The spelling of 220812506 in words is "two hundred twenty million, eight hundred twelve thousand, five hundred six".