5591621 has 8 divisors (see below), whose sum is σ = 6546624. Its totient is φ = 4675680.

The previous prime is 5591617. The next prime is 5591653. The reversal of 5591621 is 1261955.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5591621 - 2² = 5591617 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 9455 + ... + 10028.

It is an arithmetic number, because the mean of its divisors is an integer number (818328).

Almost surely, 2^5591621 is an apocalyptic number.

It is an amenable number.

5591621 is a deficient number, since it is larger than the sum of its proper divisors (955003).

5591621 is a wasteful number, since it uses less digits than its factorization.

5591621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19531.

The product of its digits is 2700, while the sum is 29.

The square root of 5591621 is about 2364.6608636335. The cubic root of 5591621 is about 177.4921877141.

The spelling of 5591621 in words is "five million, five hundred ninety-one thousand, six hundred twenty-one".