1531323 has 12 divisors (see below), whose sum is σ = 2224560. Its totient is φ = 1015056.

The previous prime is 1531303. The next prime is 1531331. The reversal of 1531323 is 3231351.

It is not a de Polignac number, because 1531323 - 2¹³ = 1523131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1531296 and 1531305.

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1690 + ... + 2432.

It is an arithmetic number, because the mean of its divisors is an integer number (185380).

2^1531323 is an apocalyptic number.

1531323 is a deficient number, since it is larger than the sum of its proper divisors (693237).

1531323 is a wasteful number, since it uses less digits than its factorization.

1531323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978 (or 975 counting only the distinct ones).

The product of its digits is 270, while the sum is 18.

The square root of 1531323 is about 1237.4663631792. The cubic root of 1531323 is about 115.2627389015.

Adding to 1531323 its reverse (3231351), we get a palindrome (4762674).

The spelling of 1531323 in words is "one million, five hundred thirty-one thousand, three hundred twenty-three".