47320515 has 24 divisors (see below), whose sum is σ = 89479728. Its totient is φ = 22943040.

The previous prime is 47320513. The next prime is 47320549. The reversal of 47320515 is 51502374.

It is a happy number.

It is not a de Polignac number, because 47320515 - 2¹ = 47320513 is a prime.

It is a super-2 number, since 2×47320515² = 4478462279730450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47320513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47304 + ... + 48293.

It is an arithmetic number, because the mean of its divisors is an integer number (3728322).

Almost surely, 2^47320515 is an apocalyptic number.

47320515 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

47320515 is a deficient number, since it is larger than the sum of its proper divisors (42159213).

47320515 is a wasteful number, since it uses less digits than its factorization.

47320515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95619 (or 95616 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 47320515 is about 6878.9908416860. The cubic root of 47320515 is about 361.7010927562.

Adding to 47320515 its reverse (51502374), we get a palindrome (98822889).

The spelling of 47320515 in words is "forty-seven million, three hundred twenty thousand, five hundred fifteen".