1540220953 has 2 divisors, whose sum is σ = 1540220954. Its totient is φ = 1540220952.

The previous prime is 1540220947. The next prime is 1540220987. The reversal of 1540220953 is 3590220451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1378117129 + 162103824 = 37123^2 + 12732^2 .

It is an emirp because it is prime and its reverse (3590220451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1540220953 - 2⁹ = 1540220441 is a prime.

It is not a weakly prime, because it can be changed into another prime (1540220933) 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, 770110476 + 770110477.

It is an arithmetic number, because the mean of its divisors is an integer number (770110477).

Almost surely, 2^1540220953 is an apocalyptic number.

It is an amenable number.

1540220953 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540220953 is an equidigital number, since it uses as much as digits as its factorization.

1540220953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1540220953 is about 39245.6488416232. The cubic root of 1540220953 is about 1154.8555763521.

The spelling of 1540220953 in words is "one billion, five hundred forty million, two hundred twenty thousand, nine hundred fifty-three".