5231661 has 8 divisors (see below), whose sum is σ = 6995040. Its totient is φ = 3478032.

The previous prime is 5231657. The next prime is 5231663. The reversal of 5231661 is 1661325.

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

It is not a de Polignac number, because 5231661 - 2² = 5231657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5231663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1075 + ... + 3408.

It is an arithmetic number, because the mean of its divisors is an integer number (874380).

Almost surely, 2^5231661 is an apocalyptic number.

It is an amenable number.

5231661 is a deficient number, since it is larger than the sum of its proper divisors (1763379).

5231661 is a wasteful number, since it uses less digits than its factorization.

5231661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4875.

The product of its digits is 1080, while the sum is 24.

The square root of 5231661 is about 2287.2824486713. The cubic root of 5231661 is about 173.5987251883.

Adding to 5231661 its reverse (1661325), we get a palindrome (6892986).

It can be divided in two parts, 52 and 31661, that added together give a palindrome (31713).

The spelling of 5231661 in words is "five million, two hundred thirty-one thousand, six hundred sixty-one".