55420213530 has 64 divisors (see below), whose sum is σ = 145990522368. Its totient is φ = 13352765760.

The previous prime is 55420213529. The next prime is 55420213561. The reversal of 55420213530 is 3531202455.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 461364 + ... + 568943.

It is an arithmetic number, because the mean of its divisors is an integer number (2281101912).

Almost surely, 2^55420213530 is an apocalyptic number.

55420213530 is an abundant number, since it is smaller than the sum of its proper divisors (90570308838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55420213530 is a wasteful number, since it uses less digits than its factorization.

55420213530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030491.

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 55420213530 its reverse (3531202455), we get a palindrome (58951415985).

The spelling of 55420213530 in words is "fifty-five billion, four hundred twenty million, two hundred thirteen thousand, five hundred thirty".