5631911 has 2 divisors, whose sum is σ = 5631912. Its totient is φ = 5631910.

The previous prime is 5631893. The next prime is 5631943. The reversal of 5631911 is 1191365.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5631911 - 2¹⁰ = 5630887 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5631991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2815955 + 2815956.

It is an arithmetic number, because the mean of its divisors is an integer number (2815956).

Almost surely, 2^5631911 is an apocalyptic number.

5631911 is a deficient number, since it is larger than the sum of its proper divisors (1).

5631911 is an equidigital number, since it uses as much as digits as its factorization.

5631911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810, while the sum is 26.

The square root of 5631911 is about 2373.1647646129. The cubic root of 5631911 is about 177.9174700520.

The spelling of 5631911 in words is "five million, six hundred thirty-one thousand, nine hundred eleven".