53571521 has 8 divisors (see below), whose sum is σ = 54405120. Its totient is φ = 52744608.

The previous prime is 53571517. The next prime is 53571541. The reversal of 53571521 is 12517535.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53571521 - 2² = 53571517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53571541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15860 + ... + 18938.

It is an arithmetic number, because the mean of its divisors is an integer number (6800640).

Almost surely, 2^53571521 is an apocalyptic number.

It is an amenable number.

53571521 is a deficient number, since it is larger than the sum of its proper divisors (833599).

53571521 is a wasteful number, since it uses less digits than its factorization.

53571521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3343.

The product of its digits is 5250, while the sum is 29.

The square root of 53571521 is about 7319.2568611847. The cubic root of 53571521 is about 376.9739373662.

The spelling of 53571521 in words is "fifty-three million, five hundred seventy-one thousand, five hundred twenty-one".