53878521 has 8 divisors (see below), whose sum is σ = 71920864. Its totient is φ = 35877600.

The previous prime is 53878511. The next prime is 53878523. The reversal of 53878521 is 12587835.

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

It is not a de Polignac number, because 53878521 - 2⁷ = 53878393 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 53878521.

It is not an unprimeable number, because it can be changed into a prime (53878523) 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, 7180 + ... + 12621.

It is an arithmetic number, because the mean of its divisors is an integer number (8990108).

Almost surely, 2^53878521 is an apocalyptic number.

It is an amenable number.

53878521 is a deficient number, since it is larger than the sum of its proper divisors (18042343).

53878521 is a wasteful number, since it uses less digits than its factorization.

53878521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20711.

The product of its digits is 67200, while the sum is 39.

The square root of 53878521 is about 7340.1989755047. The cubic root of 53878521 is about 377.6926689250.

The spelling of 53878521 in words is "fifty-three million, eight hundred seventy-eight thousand, five hundred twenty-one".