47381231 has 4 divisors (see below), whose sum is σ = 49875000. Its totient is φ = 44887464.

The previous prime is 47381207. The next prime is 47381263. The reversal of 47381231 is 13218374.

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 47381231 - 2⁶ = 47381167 is a prime.

It is a super-2 number, since 2×47381231² = 4489962102150722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 47381194 and 47381203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47381531) 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, 1246856 + ... + 1246893.

It is an arithmetic number, because the mean of its divisors is an integer number (12468750).

Almost surely, 2^47381231 is an apocalyptic number.

47381231 is a deficient number, since it is larger than the sum of its proper divisors (2493769).

47381231 is a wasteful number, since it uses less digits than its factorization.

47381231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2493768.

The product of its digits is 4032, while the sum is 29.

The square root of 47381231 is about 6883.4025743087. The cubic root of 47381231 is about 361.8557237702.

The spelling of 47381231 in words is "forty-seven million, three hundred eighty-one thousand, two hundred thirty-one".