5621551 has 16 divisors (see below), whose sum is σ = 6350400. Its totient is φ = 4942080.

The previous prime is 5621513. The next prime is 5621597. The reversal of 5621551 is 1551265.

It is not a de Polignac number, because 5621551 - 2⁷ = 5621423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5621051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28150 + ... + 28348.

It is an arithmetic number, because the mean of its divisors is an integer number (396900).

Almost surely, 2^5621551 is an apocalyptic number.

5621551 is a deficient number, since it is larger than the sum of its proper divisors (728849).

5621551 is a wasteful number, since it uses less digits than its factorization.

5621551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306.

The product of its digits is 1500, while the sum is 25.

The square root of 5621551 is about 2370.9810205904. The cubic root of 5621551 is about 177.8083089780.

The spelling of 5621551 in words is "five million, six hundred twenty-one thousand, five hundred fifty-one".