55052521 has 8 divisors (see below), whose sum is σ = 55928840. Its totient is φ = 54183168.

The previous prime is 55052483. The next prime is 55052533. The reversal of 55052521 is 12525055.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18619225 + 36433296 = 4315^2 + 6036^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55052521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55052551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15505 + ... + 18721.

It is an arithmetic number, because the mean of its divisors is an integer number (6991105).

Almost surely, 2^55052521 is an apocalyptic number.

It is an amenable number.

55052521 is a deficient number, since it is larger than the sum of its proper divisors (876319).

55052521 is a wasteful number, since it uses less digits than its factorization.

55052521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3483.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 55052521 is about 7419.7386072556. The cubic root of 55052521 is about 380.4162589989.

Adding to 55052521 its reverse (12525055), we get a palindrome (67577576).

The spelling of 55052521 in words is "fifty-five million, fifty-two thousand, five hundred twenty-one".