212562881 has 2 divisors, whose sum is σ = 212562882. Its totient is φ = 212562880.

The previous prime is 212562869. The next prime is 212562887. The reversal of 212562881 is 188265212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204633025 + 7929856 = 14305^2 + 2816^2 .

It is a cyclic number.

It is not a de Polignac number, because 212562881 - 2²⁶ = 145454017 is a prime.

It is a super-2 number, since 2×212562881² = 90365956758040322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212562887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106281440 + 106281441.

It is an arithmetic number, because the mean of its divisors is an integer number (106281441).

Almost surely, 2^212562881 is an apocalyptic number.

It is an amenable number.

212562881 is a deficient number, since it is larger than the sum of its proper divisors (1).

212562881 is an equidigital number, since it uses as much as digits as its factorization.

212562881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15360, while the sum is 35.

The square root of 212562881 is about 14579.5363780883. The cubic root of 212562881 is about 596.8004508777.

The spelling of 212562881 in words is "two hundred twelve million, five hundred sixty-two thousand, eight hundred eighty-one".