55230521 has 8 divisors (see below), whose sum is σ = 57954624. Its totient is φ = 52533360.

The previous prime is 55230509. The next prime is 55230523. The reversal of 55230521 is 12503255.

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

It is a cyclic number.

It is not a de Polignac number, because 55230521 - 2⁶ = 55230457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55230523) 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 7 ways as a sum of consecutive naturals, for example, 2471 + ... + 10796.

It is an arithmetic number, because the mean of its divisors is an integer number (7244328).

Almost surely, 2^55230521 is an apocalyptic number.

It is an amenable number.

55230521 is a deficient number, since it is larger than the sum of its proper divisors (2724103).

55230521 is a wasteful number, since it uses less digits than its factorization.

55230521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13471.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 55230521 is about 7431.7239588133. The cubic root of 55230521 is about 380.8258148450.

Adding to 55230521 its reverse (12503255), we get a palindrome (67733776).

The spelling of 55230521 in words is "fifty-five million, two hundred thirty thousand, five hundred twenty-one".