1540533513 has 8 divisors (see below), whose sum is σ = 2059643008. Its totient is φ = 1024223184.

The previous prime is 1540533503. The next prime is 1540533541. The reversal of 1540533513 is 3153350451.

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

It is not a de Polignac number, because 1540533513 - 2⁴ = 1540533497 is a prime.

It is a super-2 number, since 2×1540533513² = 4746487009352242338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1540533503) 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, 698506 + ... + 700707.

It is an arithmetic number, because the mean of its divisors is an integer number (257455376).

Almost surely, 2^1540533513 is an apocalyptic number.

It is an amenable number.

1540533513 is a deficient number, since it is larger than the sum of its proper divisors (519109495).

1540533513 is a wasteful number, since it uses less digits than its factorization.

1540533513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399583.

The product of its (nonzero) digits is 13500, while the sum is 30.

The square root of 1540533513 is about 39249.6307371165. The cubic root of 1540533513 is about 1154.9336900894.

Adding to 1540533513 its reverse (3153350451), we get a palindrome (4693883964).

The spelling of 1540533513 in words is "one billion, five hundred forty million, five hundred thirty-three thousand, five hundred thirteen".