47099218 has 4 divisors (see below), whose sum is σ = 70648830. Its totient is φ = 23549608.

The previous prime is 47099207. The next prime is 47099237. The reversal of 47099218 is 81299074.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81299074 = 2 ⋅40649537.

It can be written as a sum of positive squares in only one way, i.e., 42549529 + 4549689 = 6523^2 + 2133^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 7.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11774803 + ... + 11774806.

Almost surely, 2^47099218 is an apocalyptic number.

47099218 is a deficient number, since it is larger than the sum of its proper divisors (23549612).

47099218 is a wasteful number, since it uses less digits than its factorization.

47099218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23549611.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 47099218 is about 6862.8870018382. The cubic root of 47099218 is about 361.1363731510.

The spelling of 47099218 in words is "forty-seven million, ninety-nine thousand, two hundred eighteen".