1561475043 has 32 divisors (see below), whose sum is σ = 2519040000. Its totient is φ = 952178976.

The previous prime is 1561475017. The next prime is 1561475059. The reversal of 1561475043 is 3405741651.

1561475043 is a `hidden beast` number, since 1 + 5 + 6 + 147 + 504 + 3 = 666.

It is not a de Polignac number, because 1561475043 - 2⁶ = 1561474979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1561474989 and 1561475007.

It is not an unprimeable number, because it can be changed into a prime (1561475063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37603 + ... + 67356.

It is an arithmetic number, because the mean of its divisors is an integer number (78720000).

Almost surely, 2^1561475043 is an apocalyptic number.

1561475043 is a deficient number, since it is larger than the sum of its proper divisors (957564957).

1561475043 is a wasteful number, since it uses less digits than its factorization.

1561475043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105016 (or 105010 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 1561475043 is about 39515.5038307751. The cubic root of 1561475043 is about 1160.1434233582.

The spelling of 1561475043 in words is "one billion, five hundred sixty-one million, four hundred seventy-five thousand, forty-three".