47221487 has 2 divisors, whose sum is σ = 47221488. Its totient is φ = 47221486.

The previous prime is 47221481. The next prime is 47221501. The reversal of 47221487 is 78412274.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47221487 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 (47221481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23610743 + 23610744.

It is an arithmetic number, because the mean of its divisors is an integer number (23610744).

Almost surely, 2^47221487 is an apocalyptic number.

47221487 is a deficient number, since it is larger than the sum of its proper divisors (1).

47221487 is an equidigital number, since it uses as much as digits as its factorization.

47221487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25088, while the sum is 35.

The square root of 47221487 is about 6871.7892138802. The cubic root of 47221487 is about 361.4486050082.

The spelling of 47221487 in words is "forty-seven million, two hundred twenty-one thousand, four hundred eighty-seven".