1540533541 has 2 divisors, whose sum is σ = 1540533542. Its totient is φ = 1540533540.

The previous prime is 1540533503. The next prime is 1540533569. The reversal of 1540533541 is 1453350451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1464669441 + 75864100 = 38271^2 + 8710^2 .

It is a cyclic number.

It is not a de Polignac number, because 1540533541 - 2⁷ = 1540533413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540533571) 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 as a sum of consecutive naturals, namely, 770266770 + 770266771.

It is an arithmetic number, because the mean of its divisors is an integer number (770266771).

Almost surely, 2^1540533541 is an apocalyptic number.

It is an amenable number.

1540533541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540533541 is an equidigital number, since it uses as much as digits as its factorization.

1540533541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 1540533541 is about 39249.6310938077. The cubic root of 1540533541 is about 1154.9336970866.

Adding to 1540533541 its reverse (1453350451), we get a palindrome (2993883992).

The spelling of 1540533541 in words is "one billion, five hundred forty million, five hundred thirty-three thousand, five hundred forty-one".