551455352421 has 16 divisors (see below), whose sum is σ = 744687820800. Its totient is φ = 362931227568.

The previous prime is 551455352339. The next prime is 551455352471. The reversal of 551455352421 is 124253554155.

It is a happy number.

It is not a de Polignac number, because 551455352421 - 2¹⁴ = 551455336037 is a prime.

It is a super-2 number, since 2×551455352421² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551455352471) 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 15 ways as a sum of consecutive naturals, for example, 1525860 + ... + 1852338.

It is an arithmetic number, because the mean of its divisors is an integer number (46542988800).

Almost surely, 2^551455352421 is an apocalyptic number.

It is an amenable number.

551455352421 is a deficient number, since it is larger than the sum of its proper divisors (193232468379).

551455352421 is a wasteful number, since it uses less digits than its factorization.

551455352421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333688.

The product of its digits is 600000, while the sum is 42.

The spelling of 551455352421 in words is "five hundred fifty-one billion, four hundred fifty-five million, three hundred fifty-two thousand, four hundred twenty-one".