5621881 has 8 divisors (see below), whose sum is σ = 5846528. Its totient is φ = 5400000.

The previous prime is 5621873. The next prime is 5621899. The reversal of 5621881 is 1881265.

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

It is a 5-Lehmer number, since φ(5621881) divides (5621881-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 5621881 - 2³ = 5621873 is a prime.

It is a super-2 number, since 2×5621881² = 63211091956322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

5621881 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5621081) 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, 4081 + ... + 5281.

It is an arithmetic number, because the mean of its divisors is an integer number (730816).

Almost surely, 2^5621881 is an apocalyptic number.

It is an amenable number.

5621881 is a deficient number, since it is larger than the sum of its proper divisors (224647).

5621881 is a wasteful number, since it uses less digits than its factorization.

5621881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383.

The product of its digits is 3840, while the sum is 31.

The square root of 5621881 is about 2371.0506110161. The cubic root of 5621881 is about 177.8117881835.

The spelling of 5621881 in words is "five million, six hundred twenty-one thousand, eight hundred eighty-one".