54051521 has 4 divisors (see below), whose sum is σ = 54067200. Its totient is φ = 54035844.

The previous prime is 54051511. The next prime is 54051533. The reversal of 54051521 is 12515045.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 54051521 - 2²² = 49857217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (54051511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161 + ... + 10398.

It is an arithmetic number, because the mean of its divisors is an integer number (13516800).

Almost surely, 2^54051521 is an apocalyptic number.

It is an amenable number.

54051521 is a deficient number, since it is larger than the sum of its proper divisors (15679).

54051521 is a wasteful number, since it uses less digits than its factorization.

54051521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15678.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 54051521 is about 7351.9739526198. The cubic root of 54051521 is about 378.0964848929.

Adding to 54051521 its reverse (12515045), we get a palindrome (66566566).

The spelling of 54051521 in words is "fifty-four million, fifty-one thousand, five hundred twenty-one".