47042431 has 4 divisors (see below), whose sum is σ = 47066200. Its totient is φ = 47018664.

The previous prime is 47042377. The next prime is 47042447. The reversal of 47042431 is 13424074.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13424074 = 2 ⋅6712037.

It is a cyclic number.

It is not a de Polignac number, because 47042431 - 2¹⁵ = 47009663 is a prime.

It is a super-3 number, since 3×47042431³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a zygodrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 47042396 and 47042405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47045431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8616 + ... + 12973.

It is an arithmetic number, because the mean of its divisors is an integer number (11766550).

Almost surely, 2^47042431 is an apocalyptic number.

47042431 is a deficient number, since it is larger than the sum of its proper divisors (23769).

47042431 is a wasteful number, since it uses less digits than its factorization.

47042431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23768.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 47042431 is about 6858.7485010022. The cubic root of 47042431 is about 360.9911754198.

The spelling of 47042431 in words is "forty-seven million, forty-two thousand, four hundred thirty-one".