53479821 has 8 divisors (see below), whose sum is σ = 71779264. Its totient is φ = 35416800.

The previous prime is 53479819. The next prime is 53479861. The reversal of 53479821 is 12897435.

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

It is not a de Polignac number, because 53479821 - 2¹ = 53479819 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 53479821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53479801) 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, 58576 + ... + 59481.

It is an arithmetic number, because the mean of its divisors is an integer number (8972408).

Almost surely, 2^53479821 is an apocalyptic number.

It is an amenable number.

53479821 is a deficient number, since it is larger than the sum of its proper divisors (18299443).

53479821 is a wasteful number, since it uses less digits than its factorization.

53479821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118211.

The product of its digits is 60480, while the sum is 39.

The square root of 53479821 is about 7312.9898810268. The cubic root of 53479821 is about 376.7587219422.

The spelling of 53479821 in words is "fifty-three million, four hundred seventy-nine thousand, eight hundred twenty-one".