131215560001 has 4 divisors (see below), whose sum is σ = 138934122372. Its totient is φ = 123496997632.

The previous prime is 131215559987. The next prime is 131215560017. The reversal of 131215560001 is 100065512131.

It is a happy number.

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 46753250625 + 84462309376 = 216225^2 + 290624^2 .

It is a cyclic number.

It is not a de Polignac number, because 131215560001 - 2⁷ = 131215559873 is a prime.

It is a super-2 number, since 2×131215560001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131215560401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3859281160 + ... + 3859281193.

It is an arithmetic number, because the mean of its divisors is an integer number (34733530593).

Almost surely, 2^131215560001 is an apocalyptic number.

It is an amenable number.

131215560001 is a deficient number, since it is larger than the sum of its proper divisors (7718562371).

131215560001 is an equidigital number, since it uses as much as digits as its factorization.

131215560001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7718562370.

The product of its (nonzero) digits is 900, while the sum is 25.

The spelling of 131215560001 in words is "one hundred thirty-one billion, two hundred fifteen million, five hundred sixty thousand, one".