47215439 has 2 divisors, whose sum is σ = 47215440. Its totient is φ = 47215438.

The previous prime is 47215417. The next prime is 47215447. The reversal of 47215439 is 93451274.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47215439 - 2⁸ = 47215183 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 47215399 and 47215408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47215489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23607719 + 23607720.

It is an arithmetic number, because the mean of its divisors is an integer number (23607720).

Almost surely, 2^47215439 is an apocalyptic number.

47215439 is a deficient number, since it is larger than the sum of its proper divisors (1).

47215439 is an equidigital number, since it uses as much as digits as its factorization.

47215439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 47215439 is about 6871.3491397250. The cubic root of 47215439 is about 361.4331732303.

The spelling of 47215439 in words is "forty-seven million, two hundred fifteen thousand, four hundred thirty-nine".