1540080517 has 4 divisors (see below), whose sum is σ = 1540643500. Its totient is φ = 1539517536.

The previous prime is 1540080497. The next prime is 1540080547. The reversal of 1540080517 is 7150800451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7150800451 = 2221 ⋅3219631.

It can be written as a sum of positive squares in 2 ways, for example, as 983073316 + 557007201 = 31354^2 + 23601^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1540080517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540080547) 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, 277368 + ... + 282865.

It is an arithmetic number, because the mean of its divisors is an integer number (385160875).

Almost surely, 2^1540080517 is an apocalyptic number.

It is an amenable number.

1540080517 is a deficient number, since it is larger than the sum of its proper divisors (562983).

1540080517 is an equidigital number, since it uses as much as digits as its factorization.

1540080517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562982.

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 1540080517 is about 39243.8596088611. The cubic root of 1540080517 is about 1154.8204757113.

Adding to 1540080517 its reverse (7150800451), we get a palindrome (8690880968).

The spelling of 1540080517 in words is "one billion, five hundred forty million, eighty thousand, five hundred seventeen".