1531313 has 8 divisors (see below), whose sum is σ = 1758528. Its totient is φ = 1306224.

The previous prime is 1531303. The next prime is 1531331. The reversal of 1531313 is 3131351.

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

It is a cyclic number.

It is not a de Polignac number, because 1531313 - 2⁴ = 1531297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1531291 and 1531300.

It is not an unprimeable number, because it can be changed into a prime (1531303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1595 + ... + 2367.

It is an arithmetic number, because the mean of its divisors is an integer number (219816).

2^1531313 is an apocalyptic number.

It is an amenable number.

1531313 is a deficient number, since it is larger than the sum of its proper divisors (227215).

1531313 is an equidigital number, since it uses as much as digits as its factorization.

1531313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063.

The product of its digits is 135, while the sum is 17.

The square root of 1531313 is about 1237.4623226588. The cubic root of 1531313 is about 115.2624880008.

Adding to 1531313 its reverse (3131351), we get a palindrome (4662664).

The spelling of 1531313 in words is "one million, five hundred thirty-one thousand, three hundred thirteen".