47318081 has 4 divisors (see below), whose sum is σ = 47351472. Its totient is φ = 47284692.

The previous prime is 47318071. The next prime is 47318093. The reversal of 47318081 is 18081374.

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 a de Polignac number, because none of the positive numbers 2^k-47318081 is a prime.

It is a super-2 number, since 2×47318081² = 4478001579045122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47318071) 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, 14471 + ... + 17436.

It is an arithmetic number, because the mean of its divisors is an integer number (11837868).

Almost surely, 2^47318081 is an apocalyptic number.

It is an amenable number.

47318081 is a deficient number, since it is larger than the sum of its proper divisors (33391).

47318081 is a wasteful number, since it uses less digits than its factorization.

47318081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33390.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 47318081 is about 6878.8139239261. The cubic root of 47318081 is about 361.6948911081.

The spelling of 47318081 in words is "forty-seven million, three hundred eighteen thousand, eighty-one".