53542391 has 4 divisors (see below), whose sum is σ = 61191312. Its totient is φ = 45893472.

The previous prime is 53542369. The next prime is 53542393. The reversal of 53542391 is 19324535.

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 53542391 - 2⁶ = 53542327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53542393) 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, 3824450 + ... + 3824463.

It is an arithmetic number, because the mean of its divisors is an integer number (15297828).

Almost surely, 2^53542391 is an apocalyptic number.

53542391 is a deficient number, since it is larger than the sum of its proper divisors (7648921).

53542391 is an equidigital number, since it uses as much as digits as its factorization.

53542391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7648920.

The product of its digits is 16200, while the sum is 32.

The square root of 53542391 is about 7317.2666344749. The cubic root of 53542391 is about 376.9055973130.

The spelling of 53542391 in words is "fifty-three million, five hundred forty-two thousand, three hundred ninety-one".