561551525 has 12 divisors (see below), whose sum is σ = 698400612. Its totient is φ = 447901440.

The previous prime is 561551519. The next prime is 561551537. The reversal of 561551525 is 525155165.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 194714116 + 366837409 = 13954^2 + 19153^2 .

It is not a de Polignac number, because 561551525 - 2¹² = 561547429 is a prime.

It is a Duffinian number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 24902 + ... + 41751.

It is an arithmetic number, because the mean of its divisors is an integer number (58200051).

Almost surely, 2^561551525 is an apocalyptic number.

It is an amenable number.

561551525 is a deficient number, since it is larger than the sum of its proper divisors (136849087).

561551525 is a wasteful number, since it uses less digits than its factorization.

561551525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67000 (or 66995 counting only the distinct ones).

The product of its digits is 37500, while the sum is 35.

The square root of 561551525 is about 23697.0784064196. The cubic root of 561551525 is about 825.0175815047.

The spelling of 561551525 in words is "five hundred sixty-one million, five hundred fifty-one thousand, five hundred twenty-five".