1531323130 has 8 divisors (see below), whose sum is σ = 2756381652. Its totient is φ = 612529248.

The previous prime is 1531323113. The next prime is 1531323137. The reversal of 1531323130 is 313231351.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1530452641 + 870489 = 39121^2 + 933^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1531323137) 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, 76566147 + ... + 76566166.

Almost surely, 2^1531323130 is an apocalyptic number.

1531323130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1531323130 is a deficient number, since it is larger than the sum of its proper divisors (1225058522).

1531323130 is a wasteful number, since it uses less digits than its factorization.

1531323130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153132320.

The product of its (nonzero) digits is 810, while the sum is 22.

The square root of 1531323130 is about 39132.1240159540. The cubic root of 1531323130 is about 1152.6274216317.

Adding to 1531323130 its reverse (313231351), we get a palindrome (1844554481).

The spelling of 1531323130 in words is "one billion, five hundred thirty-one million, three hundred twenty-three thousand, one hundred thirty".