53156405 has 4 divisors (see below), whose sum is σ = 63787692. Its totient is φ = 42525120.

The previous prime is 53156371. The next prime is 53156417. The reversal of 53156405 is 50465135.

53156405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16662724 + 36493681 = 4082^2 + 6041^2 .

It is not a de Polignac number, because 53156405 - 2¹⁰ = 53155381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5315636 + ... + 5315645.

It is an arithmetic number, because the mean of its divisors is an integer number (15946923).

Almost surely, 2^53156405 is an apocalyptic number.

It is an amenable number.

53156405 is a deficient number, since it is larger than the sum of its proper divisors (10631287).

53156405 is a wasteful number, since it uses less digits than its factorization.

53156405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10631286.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 53156405 is about 7290.8439154874. The cubic root of 53156405 is about 375.9977105829.

The spelling of 53156405 in words is "fifty-three million, one hundred fifty-six thousand, four hundred five".