55420213501 has 2 divisors, whose sum is σ = 55420213502. Its totient is φ = 55420213500.

The previous prime is 55420213481. The next prime is 55420213529. The reversal of 55420213501 is 10531202455.

It is an a-pointer prime, because the next prime (55420213529) can be obtained adding 55420213501 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55128692025 + 291521476 = 234795^2 + 17074^2 .

It is a cyclic number.

It is not a de Polignac number, because 55420213501 - 2³⁵ = 21060475133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55420213501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55420213561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27710106750 + 27710106751.

It is an arithmetic number, because the mean of its divisors is an integer number (27710106751).

Almost surely, 2^55420213501 is an apocalyptic number.

It is an amenable number.

55420213501 is a deficient number, since it is larger than the sum of its proper divisors (1).

55420213501 is an equidigital number, since it uses as much as digits as its factorization.

55420213501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 55420213501 its reverse (10531202455), we get a palindrome (65951415956).

The spelling of 55420213501 in words is "fifty-five billion, four hundred twenty million, two hundred thirteen thousand, five hundred one".