555101421 has 16 divisors (see below), whose sum is σ = 846918144. Its totient is φ = 316807344.

The previous prime is 555101413. The next prime is 555101423. The reversal of 555101421 is 124101555.

It is not a de Polignac number, because 555101421 - 2³ = 555101413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 555101391 and 555101400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555101423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1386 + ... + 33348.

It is an arithmetic number, because the mean of its divisors is an integer number (52932384).

Almost surely, 2^555101421 is an apocalyptic number.

It is an amenable number.

555101421 is a deficient number, since it is larger than the sum of its proper divisors (291816723).

555101421 is a wasteful number, since it uses less digits than its factorization.

555101421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32800.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 555101421 is about 23560.5904212946. The cubic root of 555101421 is about 821.8466319556.

Adding to 555101421 its reverse (124101555), we get a palindrome (679202976).

The spelling of 555101421 in words is "five hundred fifty-five million, one hundred one thousand, four hundred twenty-one".