1520312323 has 8 divisors (see below), whose sum is σ = 1571031936. Its totient is φ = 1469697600.

The previous prime is 1520312309. The next prime is 1520312357. The reversal of 1520312323 is 3232130251.

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

It is not a de Polignac number, because 1520312323 - 2⁹ = 1520311811 is a prime.

It is a super-2 number, since 2×1520312323² = 4622699118931312658, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1520312294 and 1520312303.

It is not an unprimeable number, because it can be changed into a prime (1520312383) 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, 3813 + ... + 55273.

It is an arithmetic number, because the mean of its divisors is an integer number (196378992).

Almost surely, 2^1520312323 is an apocalyptic number.

1520312323 is a deficient number, since it is larger than the sum of its proper divisors (50719613).

1520312323 is an equidigital number, since it uses as much as digits as its factorization.

1520312323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52445.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 1520312323 is about 38991.1826314617. The cubic root of 1520312323 is about 1149.8581609564.

Adding to 1520312323 its reverse (3232130251), we get a palindrome (4752442574).

The spelling of 1520312323 in words is "one billion, five hundred twenty million, three hundred twelve thousand, three hundred twenty-three".