561980731 has 8 divisors (see below), whose sum is σ = 605408384. Its totient is φ = 518581440.

The previous prime is 561980729. The next prime is 561980743. The reversal of 561980731 is 137089165.

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

It is not a de Polignac number, because 561980731 - 2¹ = 561980729 is a prime.

It is a super-2 number, since 2×561980731² = 631644684030588722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561980761) 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, 52951 + ... + 62671.

It is an arithmetic number, because the mean of its divisors is an integer number (75676048).

Almost surely, 2^561980731 is an apocalyptic number.

561980731 is a deficient number, since it is larger than the sum of its proper divisors (43427653).

561980731 is a wasteful number, since it uses less digits than its factorization.

561980731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14181.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 561980731 is about 23706.1327719221. The cubic root of 561980731 is about 825.2277209146.

The spelling of 561980731 in words is "five hundred sixty-one million, nine hundred eighty thousand, seven hundred thirty-one".