212947241 has 4 divisors (see below), whose sum is σ = 229327812. Its totient is φ = 196566672.

The previous prime is 212947201. The next prime is 212947243. The reversal of 212947241 is 142749212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48594841 + 164352400 = 6971^2 + 12820^2 .

It is a cyclic number.

It is not a de Polignac number, because 212947241 - 2¹⁴ = 212930857 is a prime.

It is a super-3 number, since 3×212947241³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212947198 and 212947207.

It is not an unprimeable number, because it can be changed into a prime (212947243) 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, 8190266 + ... + 8190291.

It is an arithmetic number, because the mean of its divisors is an integer number (57331953).

Almost surely, 2^212947241 is an apocalyptic number.

It is an amenable number.

212947241 is a deficient number, since it is larger than the sum of its proper divisors (16380571).

212947241 is a wasteful number, since it uses less digits than its factorization.

212947241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16380570.

The product of its digits is 8064, while the sum is 32.

The square root of 212947241 is about 14592.7119138288. The cubic root of 212947241 is about 597.1599493609.

The spelling of 212947241 in words is "two hundred twelve million, nine hundred forty-seven thousand, two hundred forty-one".