561133725 has 12 divisors (see below), whose sum is σ = 927741216. Its totient is φ = 299271280.

The previous prime is 561133723. The next prime is 561133757. The reversal of 561133725 is 527331165.

It is not a de Polignac number, because 561133725 - 2¹ = 561133723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561133721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3740817 + ... + 3740966.

It is an arithmetic number, because the mean of its divisors is an integer number (77311768).

Almost surely, 2^561133725 is an apocalyptic number.

It is an amenable number.

561133725 is a deficient number, since it is larger than the sum of its proper divisors (366607491).

561133725 is a wasteful number, since it uses less digits than its factorization.

561133725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7481796 (or 7481791 counting only the distinct ones).

The product of its digits is 18900, while the sum is 33.

The square root of 561133725 is about 23688.2613334115. The cubic root of 561133725 is about 824.8129236058.

The spelling of 561133725 in words is "five hundred sixty-one million, one hundred thirty-three thousand, seven hundred twenty-five".