53503553 has 4 divisors (see below), whose sum is σ = 54513108. Its totient is φ = 52494000.

The previous prime is 53503529. The next prime is 53503603. The reversal of 53503553 is 35530535.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35796289 + 17707264 = 5983^2 + 4208^2 .

It is a cyclic number.

It is not a de Polignac number, because 53503553 - 2²⁴ = 36726337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53503523) 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, 504698 + ... + 504803.

It is an arithmetic number, because the mean of its divisors is an integer number (13628277).

Almost surely, 2^53503553 is an apocalyptic number.

53503553 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

53503553 is a deficient number, since it is larger than the sum of its proper divisors (1009555).

53503553 is a wasteful number, since it uses less digits than its factorization.

53503553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009554.

The product of its (nonzero) digits is 16875, while the sum is 29.

The square root of 53503553 is about 7314.6122932114. The cubic root of 53503553 is about 376.8144433687.

The spelling of 53503553 in words is "fifty-three million, five hundred three thousand, five hundred fifty-three".