554553135221 has 4 divisors (see below), whose sum is σ = 557181349344. Its totient is φ = 551924921100.

The previous prime is 554553135211. The next prime is 554553135247. The reversal of 554553135221 is 122531355455.

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 an emirpimes, since its reverse is a distinct semiprime: 122531355455 = 5 ⋅24506271091.

It is a cyclic number.

It is not a de Polignac number, because 554553135221 - 2³⁴ = 537373266037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (554553135211) 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, 1314106745 + ... + 1314107166.

It is an arithmetic number, because the mean of its divisors is an integer number (139295337336).

Almost surely, 2^554553135221 is an apocalyptic number.

It is an amenable number.

554553135221 is a deficient number, since it is larger than the sum of its proper divisors (2628214123).

554553135221 is a wasteful number, since it uses less digits than its factorization.

554553135221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2628214122.

The product of its digits is 450000, while the sum is 41.

The spelling of 554553135221 in words is "five hundred fifty-four billion, five hundred fifty-three million, one hundred thirty-five thousand, two hundred twenty-one".