47643431 has 16 divisors (see below), whose sum is σ = 54984960. Its totient is φ = 40826880.

The previous prime is 47643403. The next prime is 47643439. The reversal of 47643431 is 13434674.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47643431 is a prime.

It is a super-2 number, since 2×47643431² = 4539793034903522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47643439) 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 15 ways as a sum of consecutive naturals, for example, 53270 + ... + 54156.

It is an arithmetic number, because the mean of its divisors is an integer number (3436560).

Almost surely, 2^47643431 is an apocalyptic number.

47643431 is a deficient number, since it is larger than the sum of its proper divisors (7341529).

47643431 is a wasteful number, since it uses less digits than its factorization.

47643431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174.

The product of its digits is 24192, while the sum is 32.

The square root of 47643431 is about 6902.4221111143. The cubic root of 47643431 is about 362.5219798008.

The spelling of 47643431 in words is "forty-seven million, six hundred forty-three thousand, four hundred thirty-one".