55320453531 has 24 divisors (see below), whose sum is σ = 91678021344. Its totient is φ = 31488675840.

The previous prime is 55320453451. The next prime is 55320453533. The reversal of 55320453531 is 13535402355.

55320453531 is a `hidden beast` number, since 5 + 53 + 20 + 4 + 53 + 531 = 666.

55320453531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55320453531 - 2¹⁷ = 55320322459 is a prime.

It is a super-2 number, since 2×55320453531² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55320453533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1692180 + ... + 1724561.

It is an arithmetic number, because the mean of its divisors is an integer number (3819917556).

Almost surely, 2^55320453531 is an apocalyptic number.

55320453531 is a deficient number, since it is larger than the sum of its proper divisors (36357567813).

55320453531 is a wasteful number, since it uses less digits than its factorization.

55320453531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3417011 (or 3417008 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 36.

Adding to 55320453531 its reverse (13535402355), we get a palindrome (68855855886).

The spelling of 55320453531 in words is "fifty-five billion, three hundred twenty million, four hundred fifty-three thousand, five hundred thirty-one".