47581515 has 12 divisors (see below), whose sum is σ = 82474704. Its totient is φ = 25376784.

The previous prime is 47581483. The next prime is 47581517. The reversal of 47581515 is 51518574.

It is not a de Polignac number, because 47581515 - 2⁵ = 47581483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47581515.

It is not an unprimeable number, because it can be changed into a prime (47581517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 528639 + ... + 528728.

It is an arithmetic number, because the mean of its divisors is an integer number (6872892).

Almost surely, 2^47581515 is an apocalyptic number.

47581515 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

47581515 is a deficient number, since it is larger than the sum of its proper divisors (34893189).

47581515 is a wasteful number, since it uses less digits than its factorization.

47581515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057378 (or 1057375 counting only the distinct ones).

The product of its digits is 28000, while the sum is 36.

The square root of 47581515 is about 6897.9355607312. The cubic root of 47581515 is about 362.3648707597.

The spelling of 47581515 in words is "forty-seven million, five hundred eighty-one thousand, five hundred fifteen".