47239515 has 24 divisors (see below), whose sum is σ = 86699808. Its totient is φ = 23712000.

The previous prime is 47239513. The next prime is 47239523. The reversal of 47239515 is 51593274.

47239515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 47239515 - 2¹ = 47239513 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 47239515.

It is not an unprimeable number, because it can be changed into a prime (47239513) 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 23 ways as a sum of consecutive naturals, for example, 30111 + ... + 31640.

It is an arithmetic number, because the mean of its divisors is an integer number (3612492).

Almost surely, 2^47239515 is an apocalyptic number.

47239515 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

47239515 is a deficient number, since it is larger than the sum of its proper divisors (39460293).

47239515 is a wasteful number, since it uses less digits than its factorization.

47239515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61779 (or 61776 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 47239515 is about 6873.1008285926. The cubic root of 47239515 is about 361.4945965458.

The spelling of 47239515 in words is "forty-seven million, two hundred thirty-nine thousand, five hundred fifteen".