53221279 has 4 divisors (see below), whose sum is σ = 53238376. Its totient is φ = 53204184.

The previous prime is 53221277. The next prime is 53221283. The reversal of 53221279 is 97212235.

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 53221279 - 2¹ = 53221277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53221279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53221277) 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, 2409 + ... + 10594.

It is an arithmetic number, because the mean of its divisors is an integer number (13309594).

Almost surely, 2^53221279 is an apocalyptic number.

53221279 is a deficient number, since it is larger than the sum of its proper divisors (17097).

53221279 is a wasteful number, since it uses less digits than its factorization.

53221279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17096.

The product of its digits is 7560, while the sum is 31.

The square root of 53221279 is about 7295.2915637416. The cubic root of 53221279 is about 376.1506088024.

The spelling of 53221279 in words is "fifty-three million, two hundred twenty-one thousand, two hundred seventy-nine".