47013431521 has 4 divisors (see below), whose sum is σ = 53729636032. Its totient is φ = 40297227012.

The previous prime is 47013431503. The next prime is 47013431533. The reversal of 47013431521 is 12513431074.

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 not a de Polignac number, because 47013431521 - 2¹³ = 47013423329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47013431561) 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, 3358102245 + ... + 3358102258.

It is an arithmetic number, because the mean of its divisors is an integer number (13432409008).

Almost surely, 2^47013431521 is an apocalyptic number.

It is an amenable number.

47013431521 is a deficient number, since it is larger than the sum of its proper divisors (6716204511).

47013431521 is an equidigital number, since it uses as much as digits as its factorization.

47013431521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6716204510.

The product of its (nonzero) digits is 10080, while the sum is 31.

Adding to 47013431521 its reverse (12513431074), we get a palindrome (59526862595).

The spelling of 47013431521 in words is "forty-seven billion, thirteen million, four hundred thirty-one thousand, five hundred twenty-one".