5515321 has 4 divisors (see below), whose sum is σ = 6303232. Its totient is φ = 4727412.

The previous prime is 5515319. The next prime is 5515333. The reversal of 5515321 is 1235155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1235155 = 5 ⋅247031.

It is a cyclic number.

It is not a de Polignac number, because 5515321 - 2¹ = 5515319 is a prime.

It is a Duffinian number.

5515321 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 5515292 and 5515301.

It is not an unprimeable number, because it can be changed into a prime (5515421) 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, 393945 + ... + 393958.

It is an arithmetic number, because the mean of its divisors is an integer number (1575808).

Almost surely, 2^5515321 is an apocalyptic number.

It is an amenable number.

5515321 is a deficient number, since it is larger than the sum of its proper divisors (787911).

5515321 is an equidigital number, since it uses as much as digits as its factorization.

5515321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787910.

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

The square root of 5515321 is about 2348.4720564657. The cubic root of 5515321 is about 176.6811692537.

It can be divided in two parts, 55 and 15321, that added together give a square (15376 = 124²).

The spelling of 5515321 in words is "five million, five hundred fifteen thousand, three hundred twenty-one".