47405513 has 4 divisors (see below), whose sum is σ = 49900560. Its totient is φ = 44910468.

The previous prime is 47405509. The next prime is 47405521. The reversal of 47405513 is 31550474.

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: 31550474 = 2 ⋅15775237.

It is a cyclic number.

It is not a de Polignac number, because 47405513 - 2² = 47405509 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 (47405573) 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, 1247495 + ... + 1247532.

It is an arithmetic number, because the mean of its divisors is an integer number (12475140).

Almost surely, 2^47405513 is an apocalyptic number.

It is an amenable number.

47405513 is a deficient number, since it is larger than the sum of its proper divisors (2495047).

47405513 is a wasteful number, since it uses less digits than its factorization.

47405513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495046.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 47405513 is about 6885.1661563102. The cubic root of 47405513 is about 361.9175279906.

Adding to 47405513 its reverse (31550474), we get a palindrome (78955987).

The spelling of 47405513 in words is "forty-seven million, four hundred five thousand, five hundred thirteen".