53512405 has 4 divisors (see below), whose sum is σ = 64214892. Its totient is φ = 42809920.

The previous prime is 53512399. The next prime is 53512409. The reversal of 53512405 is 50421535.

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 8259876 + 45252529 = 2874^2 + 6727^2 .

It is a de Polignac number, because none of the positive numbers 2^k-53512405 is a prime.

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 53512405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53512409) 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, 5351236 + ... + 5351245.

It is an arithmetic number, because the mean of its divisors is an integer number (16053723).

Almost surely, 2^53512405 is an apocalyptic number.

It is an amenable number.

53512405 is a deficient number, since it is larger than the sum of its proper divisors (10702487).

53512405 is a wasteful number, since it uses less digits than its factorization.

53512405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10702486.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 53512405 is about 7315.2173583565. The cubic root of 53512405 is about 376.8352231570.

The spelling of 53512405 in words is "fifty-three million, five hundred twelve thousand, four hundred five".