47031081 has 4 divisors (see below), whose sum is σ = 62708112. Its totient is φ = 31354052.

The previous prime is 47031079. The next prime is 47031097. The reversal of 47031081 is 18013074.

47031081 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 47031081 - 2¹ = 47031079 is a prime.

It is a super-2 number, since 2×47031081² = 4423845160057122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47031031) 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, 7838511 + ... + 7838516.

It is an arithmetic number, because the mean of its divisors is an integer number (15677028).

Almost surely, 2^47031081 is an apocalyptic number.

It is an amenable number.

47031081 is a deficient number, since it is larger than the sum of its proper divisors (15677031).

47031081 is a wasteful number, since it uses less digits than its factorization.

47031081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15677030.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 47031081 is about 6857.9210406653. The cubic root of 47031081 is about 360.9621407851.

The spelling of 47031081 in words is "forty-seven million, thirty-one thousand, eighty-one".