5211640 has 48 divisors (see below), whose sum is σ = 13645800. Its totient is φ = 1786176.

The previous prime is 5211637. The next prime is 5211641. The reversal of 5211640 is 461125.

It is a super-2 number, since 2×5211640² = 54322382979200, which contains 22 as substring.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5211641) 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 11 ways as a sum of consecutive naturals, for example, 631 + ... + 3289.

Almost surely, 2^5211640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5211640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6822900).

5211640 is an abundant number, since it is smaller than the sum of its proper divisors (8434160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5211640 is a wasteful number, since it uses less digits than its factorization.

5211640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2684 (or 2673 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 5211640 is about 2282.9016623587. The cubic root of 5211640 is about 173.3769942610.

Adding to 5211640 its reverse (461125), we get a palindrome (5672765).

The spelling of 5211640 in words is "five million, two hundred eleven thousand, six hundred forty".