212471481 has 4 divisors (see below), whose sum is σ = 283295312. Its totient is φ = 141647652.

The previous prime is 212471477. The next prime is 212471503. The reversal of 212471481 is 184174212.

212471481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 212471481 - 2² = 212471477 is a prime.

It is a super-2 number, since 2×212471481² = 90288260476666722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212471431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35411911 + ... + 35411916.

It is an arithmetic number, because the mean of its divisors is an integer number (70823828).

Almost surely, 2^212471481 is an apocalyptic number.

It is an amenable number.

212471481 is a deficient number, since it is larger than the sum of its proper divisors (70823831).

212471481 is an equidigital number, since it uses as much as digits as its factorization.

212471481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70823830.

The product of its digits is 3584, while the sum is 30.

The square root of 212471481 is about 14576.4015106610. The cubic root of 212471481 is about 596.7148991245.

The spelling of 212471481 in words is "two hundred twelve million, four hundred seventy-one thousand, four hundred eighty-one".