561631433 has 8 divisors (see below), whose sum is σ = 632453376. Its totient is φ = 494103600.

The previous prime is 561631423. The next prime is 561631439. The reversal of 561631433 is 334136165.

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

It is a cyclic number.

It is not a de Polignac number, because 561631433 - 2⁴ = 561631417 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 561631433.

It is not an unprimeable number, because it can be changed into a prime (561631439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 823166 + ... + 823847.

It is an arithmetic number, because the mean of its divisors is an integer number (79056672).

Almost surely, 2^561631433 is an apocalyptic number.

It is an amenable number.

561631433 is a deficient number, since it is larger than the sum of its proper divisors (70821943).

561631433 is a wasteful number, since it uses less digits than its factorization.

561631433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647055.

The product of its digits is 19440, while the sum is 32.

The square root of 561631433 is about 23698.7643770725. The cubic root of 561631433 is about 825.0567125997.

Adding to 561631433 its reverse (334136165), we get a palindrome (895767598).

The spelling of 561631433 in words is "five hundred sixty-one million, six hundred thirty-one thousand, four hundred thirty-three".