47312213 has 16 divisors (see below), whose sum is σ = 51984240. Its totient is φ = 42799104.

The previous prime is 47312197. The next prime is 47312227. The reversal of 47312213 is 31221374.

It can be written as a sum of positive squares in 8 ways, for example, as 5329 + 47306884 = 73^2 + 6878^2 .

It is a cyclic number.

It is not a de Polignac number, because 47312213 - 2⁴ = 47312197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47312273) 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, 245045 + ... + 245237.

It is an arithmetic number, because the mean of its divisors is an integer number (3249015).

Almost surely, 2^47312213 is an apocalyptic number.

It is an amenable number.

47312213 is a deficient number, since it is larger than the sum of its proper divisors (4672027).

47312213 is a wasteful number, since it uses less digits than its factorization.

47312213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488.

The product of its digits is 1008, while the sum is 23.

The square root of 47312213 is about 6878.3873836823. The cubic root of 47312213 is about 361.6799390128.

Adding to 47312213 its reverse (31221374), we get a palindrome (78533587).

The spelling of 47312213 in words is "forty-seven million, three hundred twelve thousand, two hundred thirteen".