5631731 has 16 divisors (see below), whose sum is σ = 6649344. Its totient is φ = 4670784.

The previous prime is 5631707. The next prime is 5631737. The reversal of 5631731 is 1371365.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 5631731 - 2¹⁴ = 5615347 is a prime.

It is a super-2 number, since 2×5631731² = 63432788112722, which contains 22 as substring.

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 5631731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5631737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52580 + ... + 52686.

It is an arithmetic number, because the mean of its divisors is an integer number (415584).

Almost surely, 2^5631731 is an apocalyptic number.

5631731 is a deficient number, since it is larger than the sum of its proper divisors (1017613).

5631731 is a wasteful number, since it uses less digits than its factorization.

5631731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290.

The product of its digits is 1890, while the sum is 26.

The square root of 5631731 is about 2373.1268402679. The cubic root of 5631731 is about 177.9155745743.

The spelling of 5631731 in words is "five million, six hundred thirty-one thousand, seven hundred thirty-one".