1561346133 has 24 divisors (see below), whose sum is σ = 2174047680. Its totient is φ = 996128640.

The previous prime is 1561346089. The next prime is 1561346153. The reversal of 1561346133 is 3316431651.

It is not a de Polignac number, because 1561346133 - 2⁶ = 1561346069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1561346094 and 1561346103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561346153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 343248 + ... + 347766.

It is an arithmetic number, because the mean of its divisors is an integer number (90585320).

Almost surely, 2^1561346133 is an apocalyptic number.

It is an amenable number.

1561346133 is a deficient number, since it is larger than the sum of its proper divisors (612701547).

1561346133 is an equidigital number, since it uses as much as digits as its factorization.

1561346133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4669 (or 4616 counting only the distinct ones).

The product of its digits is 19440, while the sum is 33.

The square root of 1561346133 is about 39513.8726651793. The cubic root of 1561346133 is about 1160.1114966649. Note that the first 3 decimals are identical.

Adding to 1561346133 its reverse (3316431651), we get a palindrome (4877777784).

The spelling of 1561346133 in words is "one billion, five hundred sixty-one million, three hundred forty-six thousand, one hundred thirty-three".