511220406 has 16 divisors (see below), whose sum is σ = 1034760384. Its totient is φ = 168353544.

The previous prime is 511220393. The next prime is 511220419. The reversal of 511220406 is 604022115.

It is an interprime number because it is at equal distance from previous prime (511220393) and next prime (511220419).

It is a super-2 number, since 2×511220406² = 522692607021609672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512776 + ... + 513771.

It is an arithmetic number, because the mean of its divisors is an integer number (64672524).

Almost surely, 2^511220406 is an apocalyptic number.

511220406 is an abundant number, since it is smaller than the sum of its proper divisors (523539978).

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

511220406 is a wasteful number, since it uses less digits than its factorization.

511220406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026635.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 511220406 is about 22610.1836790416. The cubic root of 511220406 is about 799.5937551997.

The spelling of 511220406 in words is "five hundred eleven million, two hundred twenty thousand, four hundred six".