5551631 has 4 divisors (see below), whose sum is σ = 5567712. Its totient is φ = 5535552.

The previous prime is 5551627. The next prime is 5551633. The reversal of 5551631 is 1361555.

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

It is a cyclic number.

It is not a de Polignac number, because 5551631 - 2² = 5551627 is a prime.

It is a super-2 number, since 2×5551631² = 61641213520322, which contains 22 as substring.

It is an Ulam number.

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 5551631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5551633) 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, 7511 + ... + 8216.

It is an arithmetic number, because the mean of its divisors is an integer number (1391928).

Almost surely, 2^5551631 is an apocalyptic number.

5551631 is a deficient number, since it is larger than the sum of its proper divisors (16081).

5551631 is a wasteful number, since it uses less digits than its factorization.

5551631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16080.

The product of its digits is 2250, while the sum is 26.

The square root of 5551631 is about 2356.1899329214. The cubic root of 5551631 is about 177.0680470803.

The spelling of 5551631 in words is "five million, five hundred fifty-one thousand, six hundred thirty-one".