53557809 has 8 divisors (see below), whose sum is σ = 73872960. Its totient is φ = 34473936.

The previous prime is 53557807. The next prime is 53557831. The reversal of 53557809 is 90875535.

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

It is not a de Polignac number, because 53557809 - 2¹ = 53557807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53557807) 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, 307717 + ... + 307890.

It is an arithmetic number, because the mean of its divisors is an integer number (9234120).

Almost surely, 2^53557809 is an apocalyptic number.

It is an amenable number.

53557809 is a deficient number, since it is larger than the sum of its proper divisors (20315151).

53557809 is a wasteful number, since it uses less digits than its factorization.

53557809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615639.

The product of its (nonzero) digits is 189000, while the sum is 42.

The square root of 53557809 is about 7318.3200941200. The cubic root of 53557809 is about 376.9417715960.

The spelling of 53557809 in words is "fifty-three million, five hundred fifty-seven thousand, eight hundred nine".