551450134232421 has 4 divisors (see below), whose sum is σ = 735266845643232. Its totient is φ = 367633422821612.

The previous prime is 551450134232383. The next prime is 551450134232441. The reversal of 551450134232421 is 124232431054155.

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.

It is a cyclic number.

It is not a de Polignac number, because 551450134232421 - 2⁶ = 551450134232357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551450134232441) 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, 91908355705401 + ... + 91908355705406.

It is an arithmetic number, because the mean of its divisors is an integer number (183816711410808).

Almost surely, 2^{551450134232421} is an apocalyptic number.

It is an amenable number.

551450134232421 is a deficient number, since it is larger than the sum of its proper divisors (183816711410811).

551450134232421 is a wasteful number, since it uses less digits than its factorization.

551450134232421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183816711410810.

The product of its (nonzero) digits is 576000, while the sum is 42.

Adding to 551450134232421 its reverse (124232431054155), we get a palindrome (675682565286576).

The spelling of 551450134232421 in words is "five hundred fifty-one trillion, four hundred fifty billion, one hundred thirty-four million, two hundred thirty-two thousand, four hundred twenty-one".