53404445 has 4 divisors (see below), whose sum is σ = 64085340. Its totient is φ = 42723552.

The previous prime is 53404433. The next prime is 53404447. The reversal of 53404445 is 54440435.

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 21921124 + 31483321 = 4682^2 + 5611^2 .

It is a cyclic number.

It is not a de Polignac number, because 53404445 - 2¹⁸ = 53142301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53404447) 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, 5340440 + ... + 5340449.

It is an arithmetic number, because the mean of its divisors is an integer number (16021335).

Almost surely, 2^53404445 is an apocalyptic number.

It is an amenable number.

53404445 is a deficient number, since it is larger than the sum of its proper divisors (10680895).

53404445 is a wasteful number, since it uses less digits than its factorization.

53404445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10680894.

The product of its (nonzero) digits is 19200, while the sum is 29.

The square root of 53404445 is about 7307.8344945681. The cubic root of 53404445 is about 376.5816338538.

The spelling of 53404445 in words is "fifty-three million, four hundred four thousand, four hundred forty-five".