1540252533 has 4 divisors (see below), whose sum is σ = 2053670048. Its totient is φ = 1026835020.

The previous prime is 1540252531. The next prime is 1540252541. The reversal of 1540252533 is 3352520451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1540252533 - 2¹ = 1540252531 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1540252533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540252531) 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 in 3 ways as a sum of consecutive naturals, for example, 256708753 + ... + 256708758.

It is an arithmetic number, because the mean of its divisors is an integer number (513417512).

Almost surely, 2^1540252533 is an apocalyptic number.

It is an amenable number.

1540252533 is a deficient number, since it is larger than the sum of its proper divisors (513417515).

1540252533 is an equidigital number, since it uses as much as digits as its factorization.

1540252533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513417514.

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 1540252533 is about 39246.0511771567. The cubic root of 1540252533 is about 1154.8634691785.

Adding to 1540252533 its reverse (3352520451), we get a palindrome (4892772984).

The spelling of 1540252533 in words is "one billion, five hundred forty million, two hundred fifty-two thousand, five hundred thirty-three".