1540023211 has 2 divisors, whose sum is σ = 1540023212. Its totient is φ = 1540023210.

The previous prime is 1540023127. The next prime is 1540023227. The reversal of 1540023211 is 1123200451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1540023211 - 2⁷ = 1540023083 is a prime.

It is not a weakly prime, because it can be changed into another prime (1540023011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770011605 + 770011606.

It is an arithmetic number, because the mean of its divisors is an integer number (770011606).

Almost surely, 2^1540023211 is an apocalyptic number.

1540023211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540023211 is an equidigital number, since it uses as much as digits as its factorization.

1540023211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1540023211 is about 39243.1294751068. The cubic root of 1540023211 is about 1154.8061520094.

Adding to 1540023211 its reverse (1123200451), we get a palindrome (2663223662).

The spelling of 1540023211 in words is "one billion, five hundred forty million, twenty-three thousand, two hundred eleven".