55221523 has 8 divisors (see below), whose sum is σ = 63700992. Its totient is φ = 46889736.

The previous prime is 55221521. The next prime is 55221533. The reversal of 55221523 is 32512255.

It is a happy number.

55221523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 55221523 - 2¹ = 55221521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55221521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36115 + ... + 37612.

It is an arithmetic number, because the mean of its divisors is an integer number (7962624).

Almost surely, 2^55221523 is an apocalyptic number.

55221523 is a deficient number, since it is larger than the sum of its proper divisors (8479469).

55221523 is a wasteful number, since it uses less digits than its factorization.

55221523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73841.

The product of its digits is 3000, while the sum is 25.

The square root of 55221523 is about 7431.1185564490. The cubic root of 55221523 is about 380.8051327008.

Adding to 55221523 its reverse (32512255), we get a palindrome (87733778).

The spelling of 55221523 in words is "fifty-five million, two hundred twenty-one thousand, five hundred twenty-three".