53403325 has 6 divisors (see below), whose sum is σ = 66220154. Its totient is φ = 42722640.

The previous prime is 53403323. The next prime is 53403331. The reversal of 53403325 is 52330435.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1879641 + 51523684 = 1371^2 + 7178^2 .

It is not a de Polignac number, because 53403325 - 2¹ = 53403323 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 2136133 = 53403325 / (5 + 3 + 4 + 0 + 3 + 3 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53403325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53403323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1068042 + ... + 1068091.

Almost surely, 2^53403325 is an apocalyptic number.

It is an amenable number.

53403325 is a deficient number, since it is larger than the sum of its proper divisors (12816829).

53403325 is a wasteful number, since it uses less digits than its factorization.

53403325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136143 (or 2136138 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 25.

The square root of 53403325 is about 7307.7578640784. The cubic root of 53403325 is about 376.5790012741.

The spelling of 53403325 in words is "fifty-three million, four hundred three thousand, three hundred twenty-five".