561722730 has 16 divisors (see below), whose sum is σ = 1348134624. Its totient is φ = 149792720.

The previous prime is 561722719. The next prime is 561722741. The reversal of 561722730 is 37227165.

It is an interprime number because it is at equal distance from previous prime (561722719) and next prime (561722741).

It is a junction number, because it is equal to n+sod(n) for n = 561722691 and 561722700.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9362016 + ... + 9362075.

It is an arithmetic number, because the mean of its divisors is an integer number (84258414).

Almost surely, 2^561722730 is an apocalyptic number.

561722730 is an abundant number, since it is smaller than the sum of its proper divisors (786411894).

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

561722730 is a wasteful number, since it uses less digits than its factorization.

561722730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18724101.

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 561722730 is about 23700.6904962704. The cubic root of 561722730 is about 825.1014163663.

Adding to 561722730 its reverse (37227165), we get a palindrome (598949895).

The spelling of 561722730 in words is "five hundred sixty-one million, seven hundred twenty-two thousand, seven hundred thirty".