5591631 has 4 divisors (see below), whose sum is σ = 7455512. Its totient is φ = 3727752.

The previous prime is 5591617. The next prime is 5591653. The reversal of 5591631 is 1361955.

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

It is not a de Polignac number, because 5591631 - 2⁷ = 5591503 is a prime.

It is a super-2 number, since 2×5591631² = 62532674480322, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5591611) 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, 931936 + ... + 931941.

It is an arithmetic number, because the mean of its divisors is an integer number (1863878).

Almost surely, 2^5591631 is an apocalyptic number.

5591631 is a deficient number, since it is larger than the sum of its proper divisors (1863881).

5591631 is a wasteful number, since it uses less digits than its factorization.

5591631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1863880.

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

The square root of 5591631 is about 2364.6629781007. The cubic root of 5591631 is about 177.4922935225.

The spelling of 5591631 in words is "five million, five hundred ninety-one thousand, six hundred thirty-one".