561318252 has 48 divisors (see below), whose sum is σ = 1430352000. Its totient is φ = 169912960.

The previous prime is 561318221. The next prime is 561318269. The reversal of 561318252 is 252813165.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168499 + ... + 171797.

It is an arithmetic number, because the mean of its divisors is an integer number (29799000).

Almost surely, 2^561318252 is an apocalyptic number.

It is an amenable number.

561318252 is an abundant number, since it is smaller than the sum of its proper divisors (869033748).

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

561318252 is a wasteful number, since it uses less digits than its factorization.

561318252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4606 (or 4604 counting only the distinct ones).

The product of its digits is 14400, while the sum is 33.

The square root of 561318252 is about 23692.1559170963. The cubic root of 561318252 is about 824.9033260459.

It can be divided in two parts, 561 and 318252, that added together give a palindrome (318813).

The spelling of 561318252 in words is "five hundred sixty-one million, three hundred eighteen thousand, two hundred fifty-two".