511138772 has 6 divisors (see below), whose sum is σ = 894492858. Its totient is φ = 255569384.

The previous prime is 511138753. The next prime is 511138787. The reversal of 511138772 is 277831115.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 316982416 + 194156356 = 17804^2 + 13934^2 .

It is a super-3 number, since 3×511138772³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63892343 + ... + 63892350.

It is an arithmetic number, because the mean of its divisors is an integer number (149082143).

Almost surely, 2^511138772 is an apocalyptic number.

It is an amenable number.

511138772 is a deficient number, since it is larger than the sum of its proper divisors (383354086).

511138772 is a wasteful number, since it uses less digits than its factorization.

511138772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127784697 (or 127784695 counting only the distinct ones).

The product of its digits is 11760, while the sum is 35.

The square root of 511138772 is about 22608.3783584759. The cubic root of 511138772 is about 799.5511920113.

Adding to 511138772 its reverse (277831115), we get a palindrome (788969887).

The spelling of 511138772 in words is "five hundred eleven million, one hundred thirty-eight thousand, seven hundred seventy-two".