555342421 has 4 divisors (see below), whose sum is σ = 555402592. Its totient is φ = 555282252.

The previous prime is 555342413. The next prime is 555342433. The reversal of 555342421 is 124243555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 555342421 - 2³ = 555342413 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 (555342461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13011 + ... + 35776.

It is an arithmetic number, because the mean of its divisors is an integer number (138850648).

Almost surely, 2^555342421 is an apocalyptic number.

It is an amenable number.

555342421 is a deficient number, since it is larger than the sum of its proper divisors (60171).

555342421 is a wasteful number, since it uses less digits than its factorization.

555342421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60170.

The product of its digits is 24000, while the sum is 31.

The square root of 555342421 is about 23565.7043391451. The cubic root of 555342421 is about 821.9655509940.

Adding to 555342421 its reverse (124243555), we get a palindrome (679585976).

It can be divided in two parts, 5553 and 42421, that added together give a palindrome (47974).

The spelling of 555342421 in words is "five hundred fifty-five million, three hundred forty-two thousand, four hundred twenty-one".