511011252 has 18 divisors (see below), whose sum is σ = 1291722978. Its totient is φ = 170337072.

The previous prime is 511011247. The next prime is 511011257. The reversal of 511011252 is 252110115.

It is an interprime number because it is at equal distance from previous prime (511011247) and next prime (511011257).

It can be written as a sum of positive squares in only one way, i.e., 288524196 + 222487056 = 16986^2 + 14916^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×511011252² = 522264999341215008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511011257) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 7097343 + ... + 7097414.

Almost surely, 2^511011252 is an apocalyptic number.

It is an amenable number.

511011252 is an abundant number, since it is smaller than the sum of its proper divisors (780711726).

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

511011252 is a wasteful number, since it uses less digits than its factorization.

511011252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14194767 (or 14194762 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 511011252 is about 22605.5579891318. The cubic root of 511011252 is about 799.4846952308.

Adding to 511011252 its reverse (252110115), we get a palindrome (763121367).

The spelling of 511011252 in words is "five hundred eleven million, eleven thousand, two hundred fifty-two".