5515625 has 14 divisors (see below), whose sum is σ = 6913974. Its totient is φ = 4400000.

The previous prime is 5515621. The next prime is 5515637. The reversal of 5515625 is 5265155.

It can be written as a sum of positive squares in 7 ways, for example, as 5480281 + 35344 = 2341^2 + 188^2 .

It is not a de Polignac number, because 5515625 - 2² = 5515621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5515621) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 15449 + ... + 15801.

Almost surely, 2^5515625 is an apocalyptic number.

It is an amenable number.

5515625 is a deficient number, since it is larger than the sum of its proper divisors (1398349).

5515625 is an frugal number, since it uses more digits than its factorization.

5515625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383 (or 358 counting only the distinct ones).

The product of its digits is 7500, while the sum is 29.

The square root of 5515625 is about 2348.5367785070. The cubic root of 5515625 is about 176.6844153680.

The spelling of 5515625 in words is "five million, five hundred fifteen thousand, six hundred twenty-five".