47492281 has 4 divisors (see below), whose sum is σ = 47928100. Its totient is φ = 47056464.

The previous prime is 47492273. The next prime is 47492299. The reversal of 47492281 is 18229474.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32592681 + 14899600 = 5709^2 + 3860^2 .

It is a cyclic number.

It is not a de Polignac number, because 47492281 - 2³ = 47492273 is a prime.

It is a super-2 number, since 2×47492281² = 4511033509165922, 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 47492281.

It is not an unprimeable number, because it can be changed into a prime (47492251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217746 + ... + 217963.

It is an arithmetic number, because the mean of its divisors is an integer number (11982025).

Almost surely, 2^47492281 is an apocalyptic number.

It is an amenable number.

47492281 is a deficient number, since it is larger than the sum of its proper divisors (435819).

47492281 is a wasteful number, since it uses less digits than its factorization.

47492281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435818.

The product of its digits is 32256, while the sum is 37.

The square root of 47492281 is about 6891.4643581753. The cubic root of 47492281 is about 362.1382035919.

The spelling of 47492281 in words is "forty-seven million, four hundred ninety-two thousand, two hundred eighty-one".