47672281 has 4 divisors (see below), whose sum is σ = 48571812. Its totient is φ = 46772752.

The previous prime is 47672279. The next prime is 47672333. The reversal of 47672281 is 18227674.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18227674 = 2 ⋅9113837.

It can be written as a sum of positive squares in 2 ways, for example, as 17598025 + 30074256 = 4195^2 + 5484^2 .

It is a cyclic number.

It is not a de Polignac number, because 47672281 - 2¹ = 47672279 is a prime.

It is a super-2 number, since 2×47672281² = 4545292751485922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47672281.

It is not an unprimeable number, because it can be changed into a prime (47672221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449686 + ... + 449791.

It is an arithmetic number, because the mean of its divisors is an integer number (12142953).

Almost surely, 2^47672281 is an apocalyptic number.

It is an amenable number.

47672281 is a deficient number, since it is larger than the sum of its proper divisors (899531).

47672281 is an equidigital number, since it uses as much as digits as its factorization.

47672281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899530.

The product of its digits is 37632, while the sum is 37.

The square root of 47672281 is about 6904.5116409490. The cubic root of 47672281 is about 362.5951388810.

The spelling of 47672281 in words is "forty-seven million, six hundred seventy-two thousand, two hundred eighty-one".