1520131323 has 8 divisors (see below), whose sum is σ = 2031221248. Its totient is φ = 1011231144.

The previous prime is 1520131307. The next prime is 1520131343. The reversal of 1520131323 is 3231310251.

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

It is not a de Polignac number, because 1520131323 - 2⁴ = 1520131307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1520131323.

It is not an unprimeable number, because it can be changed into a prime (1520131343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 545815 + ... + 548592.

It is an arithmetic number, because the mean of its divisors is an integer number (253902656).

Almost surely, 2^1520131323 is an apocalyptic number.

1520131323 is a deficient number, since it is larger than the sum of its proper divisors (511089925).

1520131323 is a wasteful number, since it uses less digits than its factorization.

1520131323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094873.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1520131323 is about 38988.8615247996. The cubic root of 1520131323 is about 1149.8125272219.

Adding to 1520131323 its reverse (3231310251), we get a palindrome (4751441574).

The spelling of 1520131323 in words is "one billion, five hundred twenty million, one hundred thirty-one thousand, three hundred twenty-three".