47231513 has 4 divisors (see below), whose sum is σ = 53978880. Its totient is φ = 40484148.

The previous prime is 47231461. The next prime is 47231519. The reversal of 47231513 is 31513274.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 47231513 - 2¹² = 47227417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (47231519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3373673 + ... + 3373686.

It is an arithmetic number, because the mean of its divisors is an integer number (13494720).

Almost surely, 2^47231513 is an apocalyptic number.

It is an amenable number.

47231513 is a deficient number, since it is larger than the sum of its proper divisors (6747367).

47231513 is an equidigital number, since it uses as much as digits as its factorization.

47231513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6747366.

The product of its digits is 2520, while the sum is 26.

The square root of 47231513 is about 6872.5186794944. The cubic root of 47231513 is about 361.4741839519.

Adding to 47231513 its reverse (31513274), we get a palindrome (78744787).

The spelling of 47231513 in words is "forty-seven million, two hundred thirty-one thousand, five hundred thirteen".