12471231505 has 8 divisors (see below), whose sum is σ = 14967430632. Its totient is φ = 9975683328.

The previous prime is 12471231503. The next prime is 12471231517. The reversal of 12471231505 is 50513217421.

It can be written as a sum of positive squares in 4 ways, for example, as 1763328064 + 10707903441 = 41992^2 + 103479^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12471231505 - 2¹ = 12471231503 is a prime.

It is a super-3 number, since 3×12471231505³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12471231503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119544 + ... + 198073.

It is an arithmetic number, because the mean of its divisors is an integer number (1870928829).

Almost surely, 2^12471231505 is an apocalyptic number.

It is an amenable number.

12471231505 is a deficient number, since it is larger than the sum of its proper divisors (2496199127).

12471231505 is an equidigital number, since it uses as much as digits as its factorization.

12471231505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325475.

The product of its (nonzero) digits is 8400, while the sum is 31.

Adding to 12471231505 its reverse (50513217421), we get a palindrome (62984448926).

The spelling of 12471231505 in words is "twelve billion, four hundred seventy-one million, two hundred thirty-one thousand, five hundred five".