3551428475421 has 4 divisors (see below), whose sum is σ = 4735237967232. Its totient is φ = 2367618983612.

The previous prime is 3551428475377. The next prime is 3551428475437. The reversal of 3551428475421 is 1245748241553.

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 3551428475421 - 2¹⁷ = 3551428344349 is a prime.

It is a super-2 number, since 2×3551428475421² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3551428475321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591904745901 + ... + 591904745906.

It is an arithmetic number, because the mean of its divisors is an integer number (1183809491808).

Almost surely, 2^{3551428475421} is an apocalyptic number.

It is an amenable number.

3551428475421 is a deficient number, since it is larger than the sum of its proper divisors (1183809491811).

3551428475421 is a wasteful number, since it uses less digits than its factorization.

3551428475421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183809491810.

The product of its digits is 5376000, while the sum is 51.

The spelling of 3551428475421 in words is "three trillion, five hundred fifty-one billion, four hundred twenty-eight million, four hundred seventy-five thousand, four hundred twenty-one".