555201231421 has 8 divisors (see below), whose sum is σ = 578538412920. Its totient is φ = 532143537408.

The previous prime is 555201231407. The next prime is 555201231437. The reversal of 555201231421 is 124132102555.

It can be written as a sum of positive squares in 4 ways, for example, as 145095475396 + 410105756025 = 380914^2 + 640395^2 .

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

It is not a de Polignac number, because 555201231421 - 2¹⁹ = 555200707133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555201231461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69867816 + ... + 69875761.

It is an arithmetic number, because the mean of its divisors is an integer number (72317301615).

Almost surely, 2^555201231421 is an apocalyptic number.

It is an amenable number.

555201231421 is a deficient number, since it is larger than the sum of its proper divisors (23337181499).

555201231421 is a wasteful number, since it uses less digits than its factorization.

555201231421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139743743.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 555201231421 its reverse (124132102555), we get a palindrome (679333333976).

The spelling of 555201231421 in words is "five hundred fifty-five billion, two hundred one million, two hundred thirty-one thousand, four hundred twenty-one".