53256403 has 4 divisors (see below), whose sum is σ = 54494968. Its totient is φ = 52017840.

The previous prime is 53256323. The next prime is 53256433. The reversal of 53256403 is 30465235.

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

It is a cyclic number.

It is not a de Polignac number, because 53256403 - 2¹³ = 53248211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53256433) 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, 619218 + ... + 619303.

It is an arithmetic number, because the mean of its divisors is an integer number (13623742).

Almost surely, 2^53256403 is an apocalyptic number.

53256403 is a deficient number, since it is larger than the sum of its proper divisors (1238565).

53256403 is a wasteful number, since it uses less digits than its factorization.

53256403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238564.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 53256403 is about 7297.6984728063. The cubic root of 53256403 is about 376.2333389237.

The spelling of 53256403 in words is "fifty-three million, two hundred fifty-six thousand, four hundred three".