551134552144621 has 2 divisors, whose sum is σ = 551134552144622. Its totient is φ = 551134552144620.

The previous prime is 551134552144591. The next prime is 551134552144663. The reversal of 551134552144621 is 126441255431155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 485449784055625 + 65684768088996 = 22032925^2 + 8104614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551134552144621 is a prime.

It is a super-2 number, since 2×551134552144621² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551134552114621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275567276072310 + 275567276072311.

It is an arithmetic number, because the mean of its divisors is an integer number (275567276072311).

Almost surely, 2^{551134552144621} is an apocalyptic number.

It is an amenable number.

551134552144621 is a deficient number, since it is larger than the sum of its proper divisors (1).

551134552144621 is an equidigital number, since it uses as much as digits as its factorization.

551134552144621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880000, while the sum is 49.

The spelling of 551134552144621 in words is "five hundred fifty-one trillion, one hundred thirty-four billion, five hundred fifty-two million, one hundred forty-four thousand, six hundred twenty-one".