55317553 has 8 divisors (see below), whose sum is σ = 59283648. Its totient is φ = 51481584.

The previous prime is 55317511. The next prime is 55317601. The reversal of 55317553 is 35571355.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55317553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55317503) 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, 31651 + ... + 33352.

It is an arithmetic number, because the mean of its divisors is an integer number (7410456).

Almost surely, 2^55317553 is an apocalyptic number.

It is an amenable number.

55317553 is a deficient number, since it is larger than the sum of its proper divisors (3966095).

55317553 is a wasteful number, since it uses less digits than its factorization.

55317553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65063.

The product of its digits is 39375, while the sum is 34.

The square root of 55317553 is about 7437.5770920374. The cubic root of 55317553 is about 381.0257443860.

The spelling of 55317553 in words is "fifty-five million, three hundred seventeen thousand, five hundred fifty-three".