54102521 has 4 divisors (see below), whose sum is σ = 59020944. Its totient is φ = 49184100.

The previous prime is 54102511. The next prime is 54102523. The reversal of 54102521 is 12520145.

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 a de Polignac number, because none of the positive numbers 2^k-54102521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54102493 and 54102502.

It is not an unprimeable number, because it can be changed into a prime (54102523) 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, 2459195 + ... + 2459216.

It is an arithmetic number, because the mean of its divisors is an integer number (14755236).

Almost surely, 2^54102521 is an apocalyptic number.

It is an amenable number.

54102521 is a deficient number, since it is larger than the sum of its proper divisors (4918423).

54102521 is a wasteful number, since it uses less digits than its factorization.

54102521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4918422.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 54102521 is about 7355.4415910943. The cubic root of 54102521 is about 378.2153644285.

Adding to 54102521 its reverse (12520145), we get a palindrome (66622666).

The spelling of 54102521 in words is "fifty-four million, one hundred two thousand, five hundred twenty-one".