47128502281 has 9 divisors (see below), whose sum is σ = 54824719431. Its totient is φ = 40394556552.

The previous prime is 47128502273. The next prime is 47128502287. The reversal of 47128502281 is 18220582174.

The square root of 47128502281 is 217091.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 75951225 + 47052551056 = 8715^2 + 216916^2 .

It is not a de Polignac number, because 47128502281 - 2³ = 47128502273 is a prime.

It is a super-2 number, since 2×47128502281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47128502287) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1504131 + ... + 1535143.

Almost surely, 2^47128502281 is an apocalyptic number.

47128502281 is the 217091-st square number.

47128502281 is the 108546-th centered octagonal number.

It is an amenable number.

47128502281 is a deficient number, since it is larger than the sum of its proper divisors (7696217150).

47128502281 is an frugal number, since it uses more digits than its factorization.

47128502281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62040 (or 31020 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 40.

The spelling of 47128502281 in words is "forty-seven billion, one hundred twenty-eight million, five hundred two thousand, two hundred eighty-one".