53865559 has 8 divisors (see below), whose sum is σ = 59423760. Its totient is φ = 48417600.

The previous prime is 53865533. The next prime is 53865577. The reversal of 53865559 is 95556835.

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

It is not a de Polignac number, because 53865559 - 2⁵ = 53865527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53865509) 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, 26532 + ... + 28489.

It is an arithmetic number, because the mean of its divisors is an integer number (7427970).

Almost surely, 2^53865559 is an apocalyptic number.

53865559 is a deficient number, since it is larger than the sum of its proper divisors (5558201).

53865559 is a wasteful number, since it uses less digits than its factorization.

53865559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55121.

The product of its digits is 810000, while the sum is 46.

The square root of 53865559 is about 7339.3159763019. The cubic root of 53865559 is about 377.6623782826.

The spelling of 53865559 in words is "fifty-three million, eight hundred sixty-five thousand, five hundred fifty-nine".