54912817 has 4 divisors (see below), whose sum is σ = 56252196. Its totient is φ = 53573440.

The previous prime is 54912787. The next prime is 54912827. The reversal of 54912817 is 71821945.

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 23001616 + 31911201 = 4796^2 + 5649^2 .

It is a cyclic number.

It is not a de Polignac number, because 54912817 - 2²³ = 46524209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54912827) 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, 669628 + ... + 669709.

It is an arithmetic number, because the mean of its divisors is an integer number (14063049).

Almost surely, 2^54912817 is an apocalyptic number.

It is an amenable number.

54912817 is a deficient number, since it is larger than the sum of its proper divisors (1339379).

54912817 is a wasteful number, since it uses less digits than its factorization.

54912817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339378.

The product of its digits is 20160, while the sum is 37.

The square root of 54912817 is about 7410.3182792644. The cubic root of 54912817 is about 380.0941987154.

It can be divided in two parts, 549 and 12817, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 54912817 in words is "fifty-four million, nine hundred twelve thousand, eight hundred seventeen".