55420213502 has 16 divisors (see below), whose sum is σ = 83348376000. Its totient is φ = 27637454880.

The previous prime is 55420213501. The next prime is 55420213529. The reversal of 55420213502 is 20531202455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55420213501) 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, 6351899 + ... + 6360617.

It is an arithmetic number, because the mean of its divisors is an integer number (5209273500).

Almost surely, 2^55420213502 is an apocalyptic number.

55420213502 is a deficient number, since it is larger than the sum of its proper divisors (27928162498).

55420213502 is a wasteful number, since it uses less digits than its factorization.

55420213502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16691.

The product of its (nonzero) digits is 12000, while the sum is 29.

Adding to 55420213502 its reverse (20531202455), we get a palindrome (75951415957).

The spelling of 55420213502 in words is "fifty-five billion, four hundred twenty million, two hundred thirteen thousand, five hundred two".