47245513 has 4 divisors (see below), whose sum is σ = 53994880. Its totient is φ = 40496148.

The previous prime is 47245511. The next prime is 47245531. The reversal of 47245513 is 31554274.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31554274 = 2 ⋅15777137.

It is not a de Polignac number, because 47245513 - 2¹ = 47245511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47245511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3374673 + ... + 3374686.

It is an arithmetic number, because the mean of its divisors is an integer number (13498720).

Almost surely, 2^47245513 is an apocalyptic number.

It is an amenable number.

47245513 is a deficient number, since it is larger than the sum of its proper divisors (6749367).

47245513 is an equidigital number, since it uses as much as digits as its factorization.

47245513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6749366.

The product of its digits is 16800, while the sum is 31.

The square root of 47245513 is about 6873.5371534604. The cubic root of 47245513 is about 361.5098955515.

Adding to 47245513 its reverse (31554274), we get a palindrome (78799787).

The spelling of 47245513 in words is "forty-seven million, two hundred forty-five thousand, five hundred thirteen".