1531142317 has 4 divisors (see below), whose sum is σ = 1531395360. Its totient is φ = 1530889276.

The previous prime is 1531142311. The next prime is 1531142329. The reversal of 1531142317 is 7132411351.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1531142317 - 2¹⁹ = 1530618029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1531142311) 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, 117217 + ... + 129622.

It is an arithmetic number, because the mean of its divisors is an integer number (382848840).

Almost surely, 2^1531142317 is an apocalyptic number.

It is an amenable number.

1531142317 is a deficient number, since it is larger than the sum of its proper divisors (253043).

1531142317 is an equidigital number, since it uses as much as digits as its factorization.

1531142317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253042.

The product of its digits is 2520, while the sum is 28.

The square root of 1531142317 is about 39129.8136591525. The cubic root of 1531142317 is about 1152.5820538446.

Adding to 1531142317 its reverse (7132411351), we get a palindrome (8663553668).

The spelling of 1531142317 in words is "one billion, five hundred thirty-one million, one hundred forty-two thousand, three hundred seventeen".