47812031 has 4 divisors (see below), whose sum is σ = 47828712. Its totient is φ = 47795352.

The previous prime is 47811997. The next prime is 47812043. The reversal of 47812031 is 13021874.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47812031 is a prime.

It is a super-2 number, since 2×47812031² = 4571980616689922, 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 (47812091) 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 3 ways as a sum of consecutive naturals, for example, 2825 + ... + 10178.

It is an arithmetic number, because the mean of its divisors is an integer number (11957178).

Almost surely, 2^47812031 is an apocalyptic number.

47812031 is a deficient number, since it is larger than the sum of its proper divisors (16681).

47812031 is a wasteful number, since it uses less digits than its factorization.

47812031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16680.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 47812031 is about 6914.6244294249. The cubic root of 47812031 is about 362.9491058326.

The spelling of 47812031 in words is "forty-seven million, eight hundred twelve thousand, thirty-one".