513646452 has 54 divisors (see below), whose sum is σ = 1427161554. Its totient is φ = 155649120.

The previous prime is 513646439. The next prime is 513646457. The reversal of 513646452 is 254646315.

513646452 is a `hidden beast` number, since 5 + 1 + 3 + 6 + 4 + 645 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 429484176 + 84162276 = 20724^2 + 9174^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513646457) by changing a digit.

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 in 17 ways as a sum of consecutive naturals, for example, 54603 + ... + 63314.

Almost surely, 2^513646452 is an apocalyptic number.

It is an amenable number.

513646452 is an abundant number, since it is smaller than the sum of its proper divisors (913515102).

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

513646452 is a wasteful number, since it uses less digits than its factorization.

513646452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117949 (or 117933 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 513646452 is about 22663.7695893688. The cubic root of 513646452 is about 800.8566095311.

The spelling of 513646452 in words is "five hundred thirteen million, six hundred forty-six thousand, four hundred fifty-two".