54121517 has 4 divisors (see below), whose sum is σ = 55441596. Its totient is φ = 52801440.

The previous prime is 54121513. The next prime is 54121531. The reversal of 54121517 is 71512145.

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 16532356 + 37589161 = 4066^2 + 6131^2 .

It is not a de Polignac number, because 54121517 - 2² = 54121513 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54121513) 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, 659978 + ... + 660059.

It is an arithmetic number, because the mean of its divisors is an integer number (13860399).

Almost surely, 2^54121517 is an apocalyptic number.

It is an amenable number.

54121517 is a deficient number, since it is larger than the sum of its proper divisors (1320079).

54121517 is a wasteful number, since it uses less digits than its factorization.

54121517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320078.

The product of its digits is 1400, while the sum is 26.

The square root of 54121517 is about 7356.7327666567. The cubic root of 54121517 is about 378.2596244632.

The spelling of 54121517 in words is "fifty-four million, one hundred twenty-one thousand, five hundred seventeen".