511221006 has 12 divisors (see below), whose sum is σ = 1107645552. Its totient is φ = 170406996.

The previous prime is 511221001. The next prime is 511221013. The reversal of 511221006 is 600122115.

It is a super-2 number, since 2×511221006² = 522693833951304072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 28401167 = 511221006 / (5 + 1 + 1 + 2 + 2 + 1 + 0 + 0 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 511221006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511221001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14200566 + ... + 14200601.

It is an arithmetic number, because the mean of its divisors is an integer number (92303796).

Almost surely, 2^511221006 is an apocalyptic number.

511221006 is an abundant number, since it is smaller than the sum of its proper divisors (596424546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

511221006 is a wasteful number, since it uses less digits than its factorization.

511221006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28401175 (or 28401172 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 511221006 is about 22610.1969473952. The cubic root of 511221006 is about 799.5940680172.

The spelling of 511221006 in words is "five hundred eleven million, two hundred twenty-one thousand, six".