47155018 has 8 divisors (see below), whose sum is σ = 70956612. Its totient is φ = 23502816.

The previous prime is 47154977. The next prime is 47155019. The reversal of 47155018 is 81055174.

It can be written as a sum of positive squares in 2 ways, for example, as 31843449 + 15311569 = 5643^2 + 3913^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (47155019) 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, 36555 + ... + 37822.

Almost surely, 2^47155018 is an apocalyptic number.

47155018 is a deficient number, since it is larger than the sum of its proper divisors (23801594).

47155018 is a wasteful number, since it uses less digits than its factorization.

47155018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74696.

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 47155018 is about 6866.9511429746. The cubic root of 47155018 is about 361.2789335989.

The spelling of 47155018 in words is "forty-seven million, one hundred fifty-five thousand, eighteen".