551211541 has 2 divisors, whose sum is σ = 551211542. Its totient is φ = 551211540.

The previous prime is 551211523. The next prime is 551211601. The reversal of 551211541 is 145112155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 541539441 + 9672100 = 23271^2 + 3110^2 .

It is a cyclic number.

It is not a de Polignac number, because 551211541 - 2⁹ = 551211029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551211841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275605770 + 275605771.

It is an arithmetic number, because the mean of its divisors is an integer number (275605771).

Almost surely, 2^551211541 is an apocalyptic number.

It is an amenable number.

551211541 is a deficient number, since it is larger than the sum of its proper divisors (1).

551211541 is an equidigital number, since it uses as much as digits as its factorization.

551211541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1000, while the sum is 25.

The square root of 551211541 is about 23477.8947310018. The cubic root of 551211541 is about 819.9224301995.

Adding to 551211541 its reverse (145112155), we get a palindrome (696323696).

The spelling of 551211541 in words is "five hundred fifty-one million, two hundred eleven thousand, five hundred forty-one".