53405291 has 4 divisors (see below), whose sum is σ = 54412992. Its totient is φ = 52397592.

The previous prime is 53405263. The next prime is 53405299. The reversal of 53405291 is 19250435.

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 53405291 - 2¹⁸ = 53143147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53405299) 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, 503771 + ... + 503876.

It is an arithmetic number, because the mean of its divisors is an integer number (13603248).

Almost surely, 2^53405291 is an apocalyptic number.

53405291 is a deficient number, since it is larger than the sum of its proper divisors (1007701).

53405291 is a wasteful number, since it uses less digits than its factorization.

53405291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007700.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 53405291 is about 7307.8923774232. The cubic root of 53405291 is about 376.5836223673.

The spelling of 53405291 in words is "fifty-three million, four hundred five thousand, two hundred ninety-one".