47218357 has 2 divisors, whose sum is σ = 47218358. Its totient is φ = 47218356.

The previous prime is 47218321. The next prime is 47218373. The reversal of 47218357 is 75381274.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46049796 + 1168561 = 6786^2 + 1081^2 .

It is a cyclic number.

It is not a de Polignac number, because 47218357 - 2⁷ = 47218229 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47218307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23609178 + 23609179.

It is an arithmetic number, because the mean of its divisors is an integer number (23609179).

Almost surely, 2^47218357 is an apocalyptic number.

It is an amenable number.

47218357 is a deficient number, since it is larger than the sum of its proper divisors (1).

47218357 is an equidigital number, since it uses as much as digits as its factorization.

47218357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 37.

The square root of 47218357 is about 6871.5614673813. The cubic root of 47218357 is about 361.4406188194.

The spelling of 47218357 in words is "forty-seven million, two hundred eighteen thousand, three hundred fifty-seven".