3131332162561 has 8 divisors (see below), whose sum is σ = 3148705537704. Its totient is φ = 3113970631680.

The previous prime is 3131332162507. The next prime is 3131332162573. The reversal of 3131332162561 is 1652612331313.

It can be written as a sum of positive squares in 4 ways, for example, as 498683130625 + 2632649031936 = 706175^2 + 1622544^2 .

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 3131332162561 - 2¹³ = 3131332154369 is a prime.

It is a super-2 number, since 2×3131332162561² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3131332162561.

It is not an unprimeable number, because it can be changed into a prime (3131332162661) 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, 2430586 + ... + 3488611.

It is an arithmetic number, because the mean of its divisors is an integer number (393588192213).

Almost surely, 2^{3131332162561} is an apocalyptic number.

It is an amenable number.

3131332162561 is a deficient number, since it is larger than the sum of its proper divisors (17373375143).

3131332162561 is a wasteful number, since it uses less digits than its factorization.

3131332162561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5922131.

The product of its digits is 58320, while the sum is 37.

Adding to 3131332162561 its reverse (1652612331313), we get a palindrome (4783944493874).

The spelling of 3131332162561 in words is "three trillion, one hundred thirty-one billion, three hundred thirty-two million, one hundred sixty-two thousand, five hundred sixty-one".