47651281 has 2 divisors, whose sum is σ = 47651282. Its totient is φ = 47651280.

The previous prime is 47651249. The next prime is 47651311. The reversal of 47651281 is 18215674.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42771600 + 4879681 = 6540^2 + 2209^2 .

It is a cyclic number.

It is not a de Polignac number, because 47651281 - 2⁵ = 47651249 is a prime.

It is a super-2 number, since 2×47651281² = 4541289161881922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47655281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23825640 + 23825641.

It is an arithmetic number, because the mean of its divisors is an integer number (23825641).

Almost surely, 2^47651281 is an apocalyptic number.

It is an amenable number.

47651281 is a deficient number, since it is larger than the sum of its proper divisors (1).

47651281 is an equidigital number, since it uses as much as digits as its factorization.

47651281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 34.

The square root of 47651281 is about 6902.9907286625. The cubic root of 47651281 is about 362.5418890951.

The spelling of 47651281 in words is "forty-seven million, six hundred fifty-one thousand, two hundred eighty-one".