47815013 has 2 divisors, whose sum is σ = 47815014. Its totient is φ = 47815012.

The previous prime is 47815007. The next prime is 47815037. The reversal of 47815013 is 31051874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44063044 + 3751969 = 6638^2 + 1937^2 .

It is a cyclic number.

It is not a de Polignac number, because 47815013 - 2¹⁰ = 47813989 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47815003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23907506 + 23907507.

It is an arithmetic number, because the mean of its divisors is an integer number (23907507).

Almost surely, 2^47815013 is an apocalyptic number.

It is an amenable number.

47815013 is a deficient number, since it is larger than the sum of its proper divisors (1).

47815013 is an equidigital number, since it uses as much as digits as its factorization.

47815013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 47815013 is about 6914.8400559955. The cubic root of 47815013 is about 362.9566512957.

Adding to 47815013 its reverse (31051874), we get a palindrome (78866887).

The spelling of 47815013 in words is "forty-seven million, eight hundred fifteen thousand, thirteen".