7255553 has 4 divisors (see below), whose sum is σ = 7261488. Its totient is φ = 7249620.

The previous prime is 7255529. The next prime is 7255609. The reversal of 7255553 is 3555527.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3555527 = 19 ⋅187133.

It is a cyclic number.

It is not a de Polignac number, because 7255553 - 2⁶ = 7255489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7255513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383 + ... + 3828.

It is an arithmetic number, because the mean of its divisors is an integer number (1815372).

Almost surely, 2^7255553 is an apocalyptic number.

It is an amenable number.

7255553 is a deficient number, since it is larger than the sum of its proper divisors (5935).

7255553 is a wasteful number, since it uses less digits than its factorization.

7255553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5934.

The product of its digits is 26250, while the sum is 32.

The square root of 7255553 is about 2693.6133724052. The cubic root of 7255553 is about 193.5932331634.

It can be divided in two parts, 7 and 255553, that multiplied together give a palindrome (1788871).

The spelling of 7255553 in words is "seven million, two hundred fifty-five thousand, five hundred fifty-three".