1561224413 has 4 divisors (see below), whose sum is σ = 1784256480. Its totient is φ = 1338192348.

The previous prime is 1561224407. The next prime is 1561224421. The reversal of 1561224413 is 3144221651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1561224413 - 2⁸ = 1561224157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561224443) 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 3 ways as a sum of consecutive naturals, for example, 111516023 + ... + 111516036.

It is an arithmetic number, because the mean of its divisors is an integer number (446064120).

Almost surely, 2^1561224413 is an apocalyptic number.

It is an amenable number.

1561224413 is a deficient number, since it is larger than the sum of its proper divisors (223032067).

1561224413 is an equidigital number, since it uses as much as digits as its factorization.

1561224413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223032066.

The product of its digits is 5760, while the sum is 29.

The square root of 1561224413 is about 39512.3324166013. The cubic root of 1561224413 is about 1160.0813490809.

The spelling of 1561224413 in words is "one billion, five hundred sixty-one million, two hundred twenty-four thousand, four hundred thirteen".