5621431 has 4 divisors (see below), whose sum is σ = 5676112. Its totient is φ = 5566752.

The previous prime is 5621423. The next prime is 5621437. The reversal of 5621431 is 1341265.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1341265 = 5 ⋅268253.

It is a cyclic number.

It is not a de Polignac number, because 5621431 - 2³ = 5621423 is a prime.

It is a super-2 number, since 2×5621431² = 63200972975522, which contains 22 as substring.

It is a Duffinian number.

5621431 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5621437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27186 + ... + 27391.

It is an arithmetic number, because the mean of its divisors is an integer number (1419028).

Almost surely, 2^5621431 is an apocalyptic number.

5621431 is a deficient number, since it is larger than the sum of its proper divisors (54681).

5621431 is a wasteful number, since it uses less digits than its factorization.

5621431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54680.

The product of its digits is 720, while the sum is 22.

The square root of 5621431 is about 2370.9557144747. The cubic root of 5621431 is about 177.8070437786.

Adding to 5621431 its reverse (1341265), we get a palindrome (6962696).

The spelling of 5621431 in words is "five million, six hundred twenty-one thousand, four hundred thirty-one".