5561431 has 16 divisors (see below), whose sum is σ = 6213888.
Its totient is φ = 4953600.
The previous prime is 5561429. The next prime is 5561441. The reversal of 5561431 is 1341655.
It is a cyclic number.
It is not a de Polignac number, because 5561431 - 21 = 5561429 is a prime.
It is a super-2 number, since 2×55614312 = 61859029535522, which contains 22 as substring.
It is a junction number, because it is equal to n+sod(n) for n = 5561396 and 5561405.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (5561401) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32061 + ... + 32233.
It is an arithmetic number, because the mean of its divisors is an integer number (388368).
Almost surely, 25561431 is an apocalyptic number.
5561431 is the 1492-nd centered pentagonal number.
5561431 is a deficient number, since it is larger than the sum of its proper divisors (652457).
5561431 is a wasteful number, since it uses less digits than its factorization.
5561431 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 282.
The product of its digits is 1800, while the sum is 25.
The square root of 5561431 is about 2358.2686445781.
The cubic root of 5561431 is about 177.1721754469.
The spelling of 5561431 in words is "five million, five hundred sixty-one thousand, four hundred thirty-one".