212347881 has 12 divisors (see below), whose sum is σ = 306871552. Its totient is φ = 141497496.

The previous prime is 212347873. The next prime is 212347907. The reversal of 212347881 is 188743212.

212347881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212347881 - 2³ = 212347873 is a prime.

It is a super-2 number, since 2×212347881² = 90183245130380322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212347801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20640 + ... + 29166.

Almost surely, 2^212347881 is an apocalyptic number.

It is an amenable number.

212347881 is a deficient number, since it is larger than the sum of its proper divisors (94523671).

212347881 is a wasteful number, since it uses less digits than its factorization.

212347881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11300 (or 11297 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 212347881 is about 14572.1611643572. The cubic root of 212347881 is about 596.5991686630.

The spelling of 212347881 in words is "two hundred twelve million, three hundred forty-seven thousand, eight hundred eighty-one".