561533137 has 16 divisors (see below), whose sum is σ = 650073600. Its totient is φ = 479376640.

The previous prime is 561533117. The next prime is 561533153. The reversal of 561533137 is 731335165.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561533137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561533117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86439 + ... + 92707.

It is an arithmetic number, because the mean of its divisors is an integer number (40629600).

Almost surely, 2^561533137 is an apocalyptic number.

It is an amenable number.

561533137 is a deficient number, since it is larger than the sum of its proper divisors (88540463).

561533137 is a wasteful number, since it uses less digits than its factorization.

561533137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6776.

The product of its digits is 28350, while the sum is 34.

The square root of 561533137 is about 23696.6904229262. The cubic root of 561533137 is about 825.0085763418.

The spelling of 561533137 in words is "five hundred sixty-one million, five hundred thirty-three thousand, one hundred thirty-seven".