53256405 has 16 divisors (see below), whose sum is σ = 87024384. Its totient is φ = 27798720.

The previous prime is 53256323. The next prime is 53256433. The reversal of 53256405 is 50465235.

It is not a de Polignac number, because 53256405 - 2⁷ = 53256277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37066 + ... + 38475.

It is an arithmetic number, because the mean of its divisors is an integer number (5439024).

Almost surely, 2^53256405 is an apocalyptic number.

It is an amenable number.

53256405 is a deficient number, since it is larger than the sum of its proper divisors (33767979).

53256405 is a wasteful number, since it uses less digits than its factorization.

53256405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75596.

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 53256405 is about 7297.6986098358. The cubic root of 53256405 is about 376.2333436334.

The spelling of 53256405 in words is "fifty-three million, two hundred fifty-six thousand, four hundred five".