561061530 has 48 divisors (see below), whose sum is σ = 1482688584. Its totient is φ = 147162240.

The previous prime is 561061511. The next prime is 561061541. The reversal of 561061530 is 35160165.

It is a happy number.

561061530 is a `hidden beast` number, since 5 + 6 + 10 + 615 + 30 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 378730521 + 182331009 = 19461^2 + 13503^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 561061494 and 561061503.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45609 + ... + 56588.

Almost surely, 2^561061530 is an apocalyptic number.

561061530 is an abundant number, since it is smaller than the sum of its proper divisors (921627054).

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

561061530 is a wasteful number, since it uses less digits than its factorization.

561061530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102271 (or 102268 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 561061530 is about 23686.7374283585. The cubic root of 561061530 is about 824.7775488396. Note that the first 3 decimals are identical.

The spelling of 561061530 in words is "five hundred sixty-one million, sixty-one thousand, five hundred thirty".