1532131540 has 24 divisors (see below), whose sum is σ = 3237222240. Its totient is φ = 609091488.

The previous prime is 1532131493. The next prime is 1532131541. The reversal of 1532131540 is 451312351.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1532131541) 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, 231730 + ... + 238249.

It is an arithmetic number, because the mean of its divisors is an integer number (134884260).

Almost surely, 2^1532131540 is an apocalyptic number.

1532131540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1532131540 is an abundant number, since it is smaller than the sum of its proper divisors (1705090700).

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

1532131540 is a wasteful number, since it uses less digits than its factorization.

1532131540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470151 (or 470149 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1532131540 is about 39142.4518904986. The cubic root of 1532131540 is about 1152.8302161070.

Adding to 1532131540 its reverse (451312351), we get a palindrome (1983443891).

The spelling of 1532131540 in words is "one billion, five hundred thirty-two million, one hundred thirty-one thousand, five hundred forty".