47215867 has 2 divisors, whose sum is σ = 47215868. Its totient is φ = 47215866.

The previous prime is 47215829. The next prime is 47215873. The reversal of 47215867 is 76851274.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47215867 is a prime.

It is not a weakly prime, because it can be changed into another prime (47215877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23607933 + 23607934.

It is an arithmetic number, because the mean of its divisors is an integer number (23607934).

Almost surely, 2^47215867 is an apocalyptic number.

47215867 is a deficient number, since it is larger than the sum of its proper divisors (1).

47215867 is an equidigital number, since it uses as much as digits as its factorization.

47215867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 40.

The square root of 47215867 is about 6871.3802834656. The cubic root of 47215867 is about 361.4342653373.

The spelling of 47215867 in words is "forty-seven million, two hundred fifteen thousand, eight hundred sixty-seven".