131519465065 has 4 divisors (see below), whose sum is σ = 157823358084. Its totient is φ = 105215572048.

The previous prime is 131519465029. The next prime is 131519465093. The reversal of 131519465065 is 560564915131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 560564915131 = 13 ⋅43120378087.

It can be written as a sum of positive squares in 2 ways, for example, as 27078677136 + 104440787929 = 164556^2 + 323173^2 .

It is a cyclic number.

It is not a de Polignac number, because 131519465065 - 2¹⁷ = 131519333993 is a prime.

It is a super-3 number, since 3×131519465065³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13151946502 + ... + 13151946511.

It is an arithmetic number, because the mean of its divisors is an integer number (39455839521).

Almost surely, 2^131519465065 is an apocalyptic number.

It is an amenable number.

131519465065 is a deficient number, since it is larger than the sum of its proper divisors (26303893019).

131519465065 is an equidigital number, since it uses as much as digits as its factorization.

131519465065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26303893018.

The product of its (nonzero) digits is 486000, while the sum is 46.

The spelling of 131519465065 in words is "one hundred thirty-one billion, five hundred nineteen million, four hundred sixty-five thousand, sixty-five".