201500453123 has 16 divisors (see below), whose sum is σ = 210977434080. Its totient is φ = 192199289856.

The previous prime is 201500453117. The next prime is 201500453129. The reversal of 201500453123 is 321354005102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (201500453117) and next prime (201500453129).

It is a cyclic number.

It is not a de Polignac number, because 201500453123 - 2¹² = 201500449027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201500453092 and 201500453101.

It is not an unprimeable number, because it can be changed into a prime (201500453129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1502540 + ... + 1631142.

It is an arithmetic number, because the mean of its divisors is an integer number (13186089630).

Almost surely, 2^201500453123 is an apocalyptic number.

201500453123 is a deficient number, since it is larger than the sum of its proper divisors (9476980957).

201500453123 is a wasteful number, since it uses less digits than its factorization.

201500453123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129286.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 201500453123 its reverse (321354005102), we get a palindrome (522854458225).

The spelling of 201500453123 in words is "two hundred one billion, five hundred million, four hundred fifty-three thousand, one hundred twenty-three".