47490221281 has 2 divisors, whose sum is σ = 47490221282. Its totient is φ = 47490221280.

The previous prime is 47490221243. The next prime is 47490221297. The reversal of 47490221281 is 18212209474.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26909449681 + 20580771600 = 164041^2 + 143460^2 .

It is a cyclic number.

It is not a de Polignac number, because 47490221281 - 2⁷ = 47490221153 is a prime.

It is a super-2 number, since 2×47490221281² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47490231281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23745110640 + 23745110641.

It is an arithmetic number, because the mean of its divisors is an integer number (23745110641).

Almost surely, 2^47490221281 is an apocalyptic number.

It is an amenable number.

47490221281 is a deficient number, since it is larger than the sum of its proper divisors (1).

47490221281 is an equidigital number, since it uses as much as digits as its factorization.

47490221281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 47490221281 in words is "forty-seven billion, four hundred ninety million, two hundred twenty-one thousand, two hundred eighty-one".