5515225 has 24 divisors (see below), whose sum is σ = 7633440. Its totient is φ = 3928320.

The previous prime is 5515219. The next prime is 5515243. The reversal of 5515225 is 5225155.

It is a happy number.

It is not a de Polignac number, because 5515225 - 2³ = 5515217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 5515225.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7734 + ... + 8416.

It is an arithmetic number, because the mean of its divisors is an integer number (318060).

Almost surely, 2^5515225 is an apocalyptic number.

It is an amenable number.

5515225 is a deficient number, since it is larger than the sum of its proper divisors (2118215).

5515225 is a wasteful number, since it uses less digits than its factorization.

5515225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729 (or 724 counting only the distinct ones).

The product of its digits is 2500, while the sum is 25.

The square root of 5515225 is about 2348.4516175557. The cubic root of 5515225 is about 176.6801441401.

It can be divided in two parts, 551 and 5225, that added together give a square (5776 = 76²).

The spelling of 5515225 in words is "five million, five hundred fifteen thousand, two hundred twenty-five".