53721271 has 4 divisors (see below), whose sum is σ = 53751600. Its totient is φ = 53690944.

The previous prime is 53721263. The next prime is 53721293. The reversal of 53721271 is 17212735.

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 53721271 - 2³ = 53721263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53721251) 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, 12331 + ... + 16108.

It is an arithmetic number, because the mean of its divisors is an integer number (13437900).

Almost surely, 2^53721271 is an apocalyptic number.

53721271 is a deficient number, since it is larger than the sum of its proper divisors (30329).

53721271 is a wasteful number, since it uses less digits than its factorization.

53721271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30328.

The product of its digits is 2940, while the sum is 28.

The square root of 53721271 is about 7329.4795858915. The cubic root of 53721271 is about 377.3248659138.

The spelling of 53721271 in words is "fifty-three million, seven hundred twenty-one thousand, two hundred seventy-one".