47420431 has 4 divisors (see below), whose sum is σ = 47500992. Its totient is φ = 47339872.

The previous prime is 47420419. The next prime is 47420441. The reversal of 47420431 is 13402474.

47420431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 47420431 - 2¹¹ = 47418383 is a prime.

It is a super-2 number, since 2×47420431² = 4497394552451522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47420396 and 47420405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47420441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39391 + ... + 40576.

It is an arithmetic number, because the mean of its divisors is an integer number (11875248).

Almost surely, 2^47420431 is an apocalyptic number.

47420431 is a deficient number, since it is larger than the sum of its proper divisors (80561).

47420431 is an equidigital number, since it uses as much as digits as its factorization.

47420431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80560.

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

The square root of 47420431 is about 6886.2494145943. The cubic root of 47420431 is about 361.9554878472.

The spelling of 47420431 in words is "forty-seven million, four hundred twenty thousand, four hundred thirty-one".