5211661 has 8 divisors (see below), whose sum is σ = 6414464. Its totient is φ = 4123440.

The previous prime is 5211659. The next prime is 5211667. The reversal of 5211661 is 1661125.

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 5211661 - 2¹ = 5211659 is a prime.

It is a super-2 number, since 2×5211661² = 54322820757842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5211667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28545 + ... + 28726.

It is an arithmetic number, because the mean of its divisors is an integer number (801808).

Almost surely, 2^5211661 is an apocalyptic number.

It is an amenable number.

5211661 is a deficient number, since it is larger than the sum of its proper divisors (1202803).

5211661 is a wasteful number, since it uses less digits than its factorization.

5211661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57291.

The product of its digits is 360, while the sum is 22.

The square root of 5211661 is about 2282.9062617637. The cubic root of 5211661 is about 173.3772271315.

Adding to 5211661 its reverse (1661125), we get a palindrome (6872786).

The spelling of 5211661 in words is "five million, two hundred eleven thousand, six hundred sixty-one".