420100055 has 8 divisors (see below), whose sum is σ = 504230832. Its totient is φ = 336006208.

The previous prime is 420100049. The next prime is 420100081. The reversal of 420100055 is 550001024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420100055 - 2¹⁶ = 420034519 is a prime.

It is a super-2 number, since 2×420100055² = 352968112422006050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35579 + ... + 45891.

It is an arithmetic number, because the mean of its divisors is an integer number (63028854).

Almost surely, 2^420100055 is an apocalyptic number.

420100055 is a deficient number, since it is larger than the sum of its proper divisors (84130777).

420100055 is a wasteful number, since it uses less digits than its factorization.

420100055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18465.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 420100055 is about 20496.3424785985. The cubic root of 420100055 is about 748.9467021848.

Adding to 420100055 its reverse (550001024), we get a palindrome (970101079).

The spelling of 420100055 in words is "four hundred twenty million, one hundred thousand, fifty-five".