1531080540 has 72 divisors (see below), whose sum is σ = 5066491248. Its totient is φ = 371170560.

The previous prime is 1531080517. The next prime is 1531080547. The reversal of 1531080540 is 450801351.

1531080540 is a `hidden beast` number, since 1 + 531 + 0 + 80 + 54 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1531080547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 384657 + ... + 388616.

It is an arithmetic number, because the mean of its divisors is an integer number (70367934).

Almost surely, 2^1531080540 is an apocalyptic number.

1531080540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1531080540 is an abundant number, since it is smaller than the sum of its proper divisors (3535410708).

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

1531080540 is a wasteful number, since it uses less digits than its factorization.

1531080540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773299 (or 773294 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1531080540 is about 39129.0242658822. The cubic root of 1531080540 is about 1152.5665525598.

Adding to 1531080540 its reverse (450801351), we get a palindrome (1981881891).

The spelling of 1531080540 in words is "one billion, five hundred thirty-one million, eighty thousand, five hundred forty".