47131615121 has 4 divisors (see below), whose sum is σ = 48020890932. Its totient is φ = 46242339312.

The previous prime is 47131615093. The next prime is 47131615123. The reversal of 47131615121 is 12151613174.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32865701521 + 14265913600 = 181289^2 + 119440^2 .

It is a cyclic number.

It is not a de Polignac number, because 47131615121 - 2¹⁰ = 47131614097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47131615123) 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, 444637826 + ... + 444637931.

It is an arithmetic number, because the mean of its divisors is an integer number (12005222733).

Almost surely, 2^47131615121 is an apocalyptic number.

It is an amenable number.

47131615121 is a deficient number, since it is larger than the sum of its proper divisors (889275811).

47131615121 is an equidigital number, since it uses as much as digits as its factorization.

47131615121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889275810.

The product of its digits is 5040, while the sum is 32.

The spelling of 47131615121 in words is "forty-seven billion, one hundred thirty-one million, six hundred fifteen thousand, one hundred twenty-one".