1533240138 has 16 divisors (see below), whose sum is σ = 3075583680. Its totient is φ = 509562816.

The previous prime is 1533240133. The next prime is 1533240143. The reversal of 1533240138 is 8310423351.

It is an interprime number because it is at equal distance from previous prime (1533240133) and next prime (1533240143).

It is not an unprimeable number, because it can be changed into a prime (1533240133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377118 + ... + 381161.

It is an arithmetic number, because the mean of its divisors is an integer number (192223980).

Almost surely, 2^1533240138 is an apocalyptic number.

1533240138 is an abundant number, since it is smaller than the sum of its proper divisors (1542343542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1533240138 is a wasteful number, since it uses less digits than its factorization.

1533240138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758621.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1533240138 is about 39156.6103997780. The cubic root of 1533240138 is about 1153.1081985816.

Adding to 1533240138 its reverse (8310423351), we get a palindrome (9843663489).

The spelling of 1533240138 in words is "one billion, five hundred thirty-three million, two hundred forty thousand, one hundred thirty-eight".