53555405 has 4 divisors (see below), whose sum is σ = 64266492. Its totient is φ = 42844320.

The previous prime is 53555401. The next prime is 53555407. The reversal of 53555405 is 50455535.

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 38663524 + 14891881 = 6218^2 + 3859^2 .

It is not a de Polignac number, because 53555405 - 2² = 53555401 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 (53555401) 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, 5355536 + ... + 5355545.

It is an arithmetic number, because the mean of its divisors is an integer number (16066623).

Almost surely, 2^53555405 is an apocalyptic number.

It is an amenable number.

53555405 is a deficient number, since it is larger than the sum of its proper divisors (10711087).

53555405 is a wasteful number, since it uses less digits than its factorization.

53555405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10711086.

The product of its (nonzero) digits is 37500, while the sum is 32.

The square root of 53555405 is about 7318.1558469330. The cubic root of 53555405 is about 376.9361316990.

The spelling of 53555405 in words is "fifty-three million, five hundred fifty-five thousand, four hundred five".