5521531 has 4 divisors (see below), whose sum is σ = 5578552. Its totient is φ = 5464512.

The previous prime is 5521499. The next prime is 5521543. The reversal of 5521531 is 1351255.

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 5521531 - 2⁵ = 5521499 is a prime.

It is a super-2 number, since 2×5521531² = 60974609167922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5521561) 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, 28365 + ... + 28558.

It is an arithmetic number, because the mean of its divisors is an integer number (1394638).

Almost surely, 2^5521531 is an apocalyptic number.

5521531 is a deficient number, since it is larger than the sum of its proper divisors (57021).

5521531 is an equidigital number, since it uses as much as digits as its factorization.

5521531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57020.

The product of its digits is 750, while the sum is 22.

The square root of 5521531 is about 2349.7938207426. The cubic root of 5521531 is about 176.7474560284.

Adding to 5521531 its reverse (1351255), we get a palindrome (6872786).

The spelling of 5521531 in words is "five million, five hundred twenty-one thousand, five hundred thirty-one".