212791541 has 2 divisors, whose sum is σ = 212791542. Its totient is φ = 212791540.

The previous prime is 212791489. The next prime is 212791549. The reversal of 212791541 is 145197212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210859441 + 1932100 = 14521^2 + 1390^2 .

It is a cyclic number.

It is not a de Polignac number, because 212791541 - 2¹⁰ = 212790517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212791498 and 212791507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212791549) 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 as a sum of consecutive naturals, namely, 106395770 + 106395771.

It is an arithmetic number, because the mean of its divisors is an integer number (106395771).

Almost surely, 2^212791541 is an apocalyptic number.

It is an amenable number.

212791541 is a deficient number, since it is larger than the sum of its proper divisors (1).

212791541 is an equidigital number, since it uses as much as digits as its factorization.

212791541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 32.

The square root of 212791541 is about 14587.3760834497. The cubic root of 212791541 is about 597.0143726543.

The spelling of 212791541 in words is "two hundred twelve million, seven hundred ninety-one thousand, five hundred forty-one".