1540312211 has 4 divisors (see below), whose sum is σ = 1540478424. Its totient is φ = 1540146000.

The previous prime is 1540312201. The next prime is 1540312229. The reversal of 1540312211 is 1122130451.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1540312211 - 2¹⁸ = 1540050067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1540312201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68330 + ... + 88031.

It is an arithmetic number, because the mean of its divisors is an integer number (385119606).

Almost surely, 2^1540312211 is an apocalyptic number.

1540312211 is a deficient number, since it is larger than the sum of its proper divisors (166213).

1540312211 is an equidigital number, since it uses as much as digits as its factorization.

1540312211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166212.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1540312211 is about 39246.8114755836. The cubic root of 1540312211 is about 1154.8783842764.

Adding to 1540312211 its reverse (1122130451), we get a palindrome (2662442662).

The spelling of 1540312211 in words is "one billion, five hundred forty million, three hundred twelve thousand, two hundred eleven".