212947293 has 16 divisors (see below), whose sum is σ = 306044480. Its totient is φ = 130927104.

The previous prime is 212947249. The next prime is 212947331. The reversal of 212947293 is 392749212.

212947293 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 212947293 - 2⁸ = 212947037 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 65613 + ... + 68781.

It is an arithmetic number, because the mean of its divisors is an integer number (19127780).

Almost surely, 2^212947293 is an apocalyptic number.

It is an amenable number.

212947293 is a deficient number, since it is larger than the sum of its proper divisors (93097187).

212947293 is a wasteful number, since it uses less digits than its factorization.

212947293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4908.

The product of its digits is 54432, while the sum is 39.

The square root of 212947293 is about 14592.7136955400. The cubic root of 212947293 is about 597.1599979681.

The spelling of 212947293 in words is "two hundred twelve million, nine hundred forty-seven thousand, two hundred ninety-three".