5521640 has 16 divisors (see below), whose sum is σ = 12423780. Its totient is φ = 2208640.

The previous prime is 5521631. The next prime is 5521643. The reversal of 5521640 is 461255.

It can be written as a sum of positive squares in 2 ways, for example, as 5134756 + 386884 = 2266^2 + 622^2 .

It is not an unprimeable number, because it can be changed into a prime (5521643) 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, 68981 + ... + 69060.

Almost surely, 2^5521640 is an apocalyptic number.

It is an amenable number.

5521640 is an abundant number, since it is smaller than the sum of its proper divisors (6902140).

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

5521640 is a wasteful number, since it uses less digits than its factorization.

5521640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138052 (or 138048 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 5521640 is about 2349.8170141524. The cubic root of 5521640 is about 176.7486190722.

Adding to 5521640 its reverse (461255), we get a palindrome (5982895).

The spelling of 5521640 in words is "five million, five hundred twenty-one thousand, six hundred forty".