505523412 has 18 divisors (see below), whose sum is σ = 1277850938. Its totient is φ = 168507792.

The previous prime is 505523393. The next prime is 505523413. The reversal of 505523412 is 214325505.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 505170576 + 352836 = 22476^2 + 594^2 .

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

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505523413) 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, 7021123 + ... + 7021194.

Almost surely, 2^505523412 is an apocalyptic number.

It is an amenable number.

505523412 is an abundant number, since it is smaller than the sum of its proper divisors (772327526).

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

505523412 is a wasteful number, since it uses less digits than its factorization.

505523412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14042327 (or 14042322 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 505523412 is about 22483.8478023669. The cubic root of 505523412 is about 796.6124529866.

Adding to 505523412 its reverse (214325505), we get a palindrome (719848917).

The spelling of 505523412 in words is "five hundred five million, five hundred twenty-three thousand, four hundred twelve".