212503261 has 2 divisors, whose sum is σ = 212503262. Its totient is φ = 212503260.

The previous prime is 212503241. The next prime is 212503283. The reversal of 212503261 is 162305212.

It is an a-pointer prime, because the next prime (212503283) can be obtained adding 212503261 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182088036 + 30415225 = 13494^2 + 5515^2 .

It is a cyclic number.

It is not a de Polignac number, because 212503261 - 2¹¹ = 212501213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212503241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106251630 + 106251631.

It is an arithmetic number, because the mean of its divisors is an integer number (106251631).

Almost surely, 2^212503261 is an apocalyptic number.

It is an amenable number.

212503261 is a deficient number, since it is larger than the sum of its proper divisors (1).

212503261 is an equidigital number, since it uses as much as digits as its factorization.

212503261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 212503261 is about 14577.4915880614. The cubic root of 212503261 is about 596.7446484568.

Adding to 212503261 its reverse (162305212), we get a palindrome (374808473).

The spelling of 212503261 in words is "two hundred twelve million, five hundred three thousand, two hundred sixty-one".