421210345522455 has 48 divisors (see below), whose sum is σ = 761853783015936. Its totient is φ = 214874806153920.

The previous prime is 421210345522411. The next prime is 421210345522469. The reversal of 421210345522455 is 554225543012124.

421210345522455 is a `hidden beast` number, since 4 + 2 + 1 + 2 + 10 + 34 + 552 + 2 + 4 + 55 = 666.

It is not a de Polignac number, because 421210345522455 - 2¹⁶ = 421210345456919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 421210345522455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60564820 + ... + 67160390.

It is an arithmetic number, because the mean of its divisors is an integer number (15871953812832).

Almost surely, 2^{421210345522455} is an apocalyptic number.

421210345522455 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

421210345522455 is a deficient number, since it is larger than the sum of its proper divisors (340643437493481).

421210345522455 is a wasteful number, since it uses less digits than its factorization.

421210345522455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6657308 (or 6657305 counting only the distinct ones).

The product of its (nonzero) digits is 1920000, while the sum is 45.

Adding to 421210345522455 its reverse (554225543012124), we get a palindrome (975435888534579).

The spelling of 421210345522455 in words is "four hundred twenty-one trillion, two hundred ten billion, three hundred forty-five million, five hundred twenty-two thousand, four hundred fifty-five".