5691531 has 4 divisors (see below), whose sum is σ = 7588712. Its totient is φ = 3794352.

The previous prime is 5691529. The next prime is 5691533. The reversal of 5691531 is 1351965.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (5691529) and next prime (5691533).

It is not a de Polignac number, because 5691531 - 2¹ = 5691529 is a prime.

It is a super-2 number, since 2×5691531² = 64787050247922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5691533) 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, 948586 + ... + 948591.

It is an arithmetic number, because the mean of its divisors is an integer number (1897178).

Almost surely, 2^5691531 is an apocalyptic number.

5691531 is a deficient number, since it is larger than the sum of its proper divisors (1897181).

5691531 is a wasteful number, since it uses less digits than its factorization.

5691531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897180.

The product of its digits is 4050, while the sum is 30.

The square root of 5691531 is about 2385.6929810854. The cubic root of 5691531 is about 178.5430852691.

The spelling of 5691531 in words is "five million, six hundred ninety-one thousand, five hundred thirty-one".