511215020 has 72 divisors (see below), whose sum is σ = 1132499760. Its totient is φ = 193818240.

The previous prime is 511214989. The next prime is 511215037. The reversal of 511215020 is 20512115.

It is a super-2 number, since 2×511215020² = 522681593347200800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 511215020.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2232266 + ... + 2232494.

Almost surely, 2^511215020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 511215020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (566249880).

511215020 is an abundant number, since it is smaller than the sum of its proper divisors (621284740).

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

511215020 is a wasteful number, since it uses less digits than its factorization.

511215020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 511215020 is about 22610.0645731055. The cubic root of 511215020 is about 799.5909471303.

Adding to 511215020 its reverse (20512115), we get a palindrome (531727135).

The spelling of 511215020 in words is "five hundred eleven million, two hundred fifteen thousand, twenty".