53163205521 has 4 divisors (see below), whose sum is σ = 70884274032. Its totient is φ = 35442137012.

The previous prime is 53163205489. The next prime is 53163205547. The reversal of 53163205521 is 12550236135.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53163205521 - 2⁵ = 53163205489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53163201521) 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, 8860534251 + ... + 8860534256.

It is an arithmetic number, because the mean of its divisors is an integer number (17721068508).

Almost surely, 2^53163205521 is an apocalyptic number.

It is an amenable number.

53163205521 is a deficient number, since it is larger than the sum of its proper divisors (17721068511).

53163205521 is a wasteful number, since it uses less digits than its factorization.

53163205521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17721068510.

The product of its (nonzero) digits is 27000, while the sum is 33.

The spelling of 53163205521 in words is "fifty-three billion, one hundred sixty-three million, two hundred five thousand, five hundred twenty-one".