53887217 has 4 divisors (see below), whose sum is σ = 54770676. Its totient is φ = 53003760.

The previous prime is 53887201. The next prime is 53887241. The reversal of 53887217 is 71278835.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22572001 + 31315216 = 4751^2 + 5596^2 .

It is a cyclic number.

It is not a de Polignac number, because 53887217 - 2⁴ = 53887201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53887117) 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, 441638 + ... + 441759.

It is an arithmetic number, because the mean of its divisors is an integer number (13692669).

Almost surely, 2^53887217 is an apocalyptic number.

It is an amenable number.

53887217 is a deficient number, since it is larger than the sum of its proper divisors (883459).

53887217 is an equidigital number, since it uses as much as digits as its factorization.

53887217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883458.

The product of its digits is 94080, while the sum is 41.

The square root of 53887217 is about 7340.7913061195. The cubic root of 53887217 is about 377.7129877131.

The spelling of 53887217 in words is "fifty-three million, eight hundred eighty-seven thousand, two hundred seventeen".