212266531 has 2 divisors, whose sum is σ = 212266532. Its totient is φ = 212266530.

The previous prime is 212266489. The next prime is 212266547. The reversal of 212266531 is 135662212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212266531 - 2¹³ = 212258339 is a prime.

It is a super-2 number, since 2×212266531² = 90114160365547922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212266531.

It is not a weakly prime, because it can be changed into another prime (212261531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106133265 + 106133266.

It is an arithmetic number, because the mean of its divisors is an integer number (106133266).

Almost surely, 2^212266531 is an apocalyptic number.

212266531 is a deficient number, since it is larger than the sum of its proper divisors (1).

212266531 is an equidigital number, since it uses as much as digits as its factorization.

212266531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 28.

The square root of 212266531 is about 14569.3696157384. The cubic root of 212266531 is about 596.5229736614.

The spelling of 212266531 in words is "two hundred twelve million, two hundred sixty-six thousand, five hundred thirty-one".