1531368873 has 6 divisors (see below), whose sum is σ = 2211977274. Its totient is φ = 1020912576.

The previous prime is 1531368869. The next prime is 1531368887. The reversal of 1531368873 is 3788631351.

1531368873 is a `hidden beast` number, since 1 + 531 + 36 + 8 + 87 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 858900249 + 672468624 = 29307^2 + 25932^2 .

It is not a de Polignac number, because 1531368873 - 2² = 1531368869 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1531368833) 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 5 ways as a sum of consecutive naturals, for example, 85076040 + ... + 85076057.

It is an arithmetic number, because the mean of its divisors is an integer number (368662879).

Almost surely, 2^1531368873 is an apocalyptic number.

It is an amenable number.

1531368873 is a deficient number, since it is larger than the sum of its proper divisors (680608401).

1531368873 is a wasteful number, since it uses less digits than its factorization.

1531368873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170152103 (or 170152100 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 1531368873 is about 39132.7084802471. The cubic root of 1531368873 is about 1152.6388984411.

The spelling of 1531368873 in words is "one billion, five hundred thirty-one million, three hundred sixty-eight thousand, eight hundred seventy-three".