1561313343 has 8 divisors (see below), whose sum is σ = 2082329008. Its totient is φ = 1040586624.

The previous prime is 1561313329. The next prime is 1561313399. The reversal of 1561313343 is 3433131651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1561313343 - 2⁵ = 1561313311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1561313343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561313323) 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 7 ways as a sum of consecutive naturals, for example, 59296 + ... + 81477.

It is an arithmetic number, because the mean of its divisors is an integer number (260291126).

Almost surely, 2^1561313343 is an apocalyptic number.

1561313343 is a deficient number, since it is larger than the sum of its proper divisors (521015665).

1561313343 is a wasteful number, since it uses less digits than its factorization.

1561313343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144473.

The product of its digits is 9720, while the sum is 30.

The square root of 1561313343 is about 39513.4577454315. The cubic root of 1561313343 is about 1160.1033753988.

Adding to 1561313343 its reverse (3433131651), we get a palindrome (4994444994).

The spelling of 1561313343 in words is "one billion, five hundred sixty-one million, three hundred thirteen thousand, three hundred forty-three".