201520323 has 12 divisors (see below), whose sum is σ = 292872840. Its totient is φ = 133521696.

The previous prime is 201520301. The next prime is 201520339. The reversal of 201520323 is 323025102.

It is not a de Polignac number, because 201520323 - 2¹⁰ = 201519299 is a prime.

It is a super-2 number, since 2×201520323² = 81220881164048658, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201520296 and 201520305.

It is not an unprimeable number, because it can be changed into a prime (201520723) 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, 67218 + ... + 70151.

It is an arithmetic number, because the mean of its divisors is an integer number (24406070).

Almost surely, 2^201520323 is an apocalyptic number.

201520323 is a deficient number, since it is larger than the sum of its proper divisors (91352517).

201520323 is a wasteful number, since it uses less digits than its factorization.

201520323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137538 (or 137535 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 201520323 is about 14195.7853956729. The cubic root of 201520323 is about 586.2816258248.

Adding to 201520323 its reverse (323025102), we get a palindrome (524545425).

The spelling of 201520323 in words is "two hundred one million, five hundred twenty thousand, three hundred twenty-three".