212003261 has 2 divisors, whose sum is σ = 212003262. Its totient is φ = 212003260.

The previous prime is 212003219. The next prime is 212003269. The reversal of 212003261 is 162300212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211848025 + 155236 = 14555^2 + 394^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212003261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212003269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106001630 + 106001631.

It is an arithmetic number, because the mean of its divisors is an integer number (106001631).

Almost surely, 2^212003261 is an apocalyptic number.

It is an amenable number.

212003261 is a deficient number, since it is larger than the sum of its proper divisors (1).

212003261 is an equidigital number, since it uses as much as digits as its factorization.

212003261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 212003261 is about 14560.3317613302. The cubic root of 212003261 is about 596.2762530651.

Adding to 212003261 its reverse (162300212), we get a palindrome (374303473).

The spelling of 212003261 in words is "two hundred twelve million, three thousand, two hundred sixty-one".