47771481 has 4 divisors (see below), whose sum is σ = 63695312. Its totient is φ = 31847652.

The previous prime is 47771473. The next prime is 47771501. The reversal of 47771481 is 18417774.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 47771481 - 2³ = 47771473 is a prime.

It is a super-2 number, since 2×47771481² = 4564228793866722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47771281) 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, 7961911 + ... + 7961916.

It is an arithmetic number, because the mean of its divisors is an integer number (15923828).

Almost surely, 2^47771481 is an apocalyptic number.

It is an amenable number.

47771481 is a deficient number, since it is larger than the sum of its proper divisors (15923831).

47771481 is a wasteful number, since it uses less digits than its factorization.

47771481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15923830.

The product of its digits is 43904, while the sum is 39.

The square root of 47771481 is about 6911.6916163845. The cubic root of 47771481 is about 362.8464695392.

The spelling of 47771481 in words is "forty-seven million, seven hundred seventy-one thousand, four hundred eighty-one".