54342521 has 4 divisors (see below), whose sum is σ = 55233444. Its totient is φ = 53451600.

The previous prime is 54342517. The next prime is 54342539. The reversal of 54342521 is 12524345.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12524345 = 5 ⋅2504869.

It can be written as a sum of positive squares in 2 ways, for example, as 4145296 + 50197225 = 2036^2 + 7085^2 .

It is a cyclic number.

It is not a de Polignac number, because 54342521 - 2² = 54342517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54342511) 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, 445370 + ... + 445491.

It is an arithmetic number, because the mean of its divisors is an integer number (13808361).

Almost surely, 2^54342521 is an apocalyptic number.

It is an amenable number.

54342521 is a deficient number, since it is larger than the sum of its proper divisors (890923).

54342521 is an equidigital number, since it uses as much as digits as its factorization.

54342521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890922.

The product of its digits is 4800, while the sum is 26.

The square root of 54342521 is about 7371.7379904606. The cubic root of 54342521 is about 378.7737967889.

Adding to 54342521 its reverse (12524345), we get a palindrome (66866866).

The spelling of 54342521 in words is "fifty-four million, three hundred forty-two thousand, five hundred twenty-one".