47811447 has 12 divisors (see below), whose sum is σ = 69300504. Its totient is φ = 31763760.

The previous prime is 47811443. The next prime is 47811461. The reversal of 47811447 is 74411874.

47811447 = 249² + 250² + ... + 541².

It is not a de Polignac number, because 47811447 - 2² = 47811443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47811443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6429 + ... + 11702.

It is an arithmetic number, because the mean of its divisors is an integer number (5775042).

Almost surely, 2^47811447 is an apocalyptic number.

47811447 is a deficient number, since it is larger than the sum of its proper divisors (21489057).

47811447 is a wasteful number, since it uses less digits than its factorization.

47811447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18430 (or 18427 counting only the distinct ones).

The product of its digits is 25088, while the sum is 36.

The square root of 47811447 is about 6914.5821999597. The cubic root of 47811447 is about 362.9476280795.

The spelling of 47811447 in words is "forty-seven million, eight hundred eleven thousand, four hundred forty-seven".