201102493 has 4 divisors (see below), whose sum is σ = 202947580. Its totient is φ = 199257408.

The previous prime is 201102467. The next prime is 201102509. The reversal of 201102493 is 394201102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 177502329 + 23600164 = 13323^2 + 4858^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201102493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201103493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 922380 + ... + 922597.

It is an arithmetic number, because the mean of its divisors is an integer number (50736895).

Almost surely, 2^201102493 is an apocalyptic number.

It is an amenable number.

201102493 is a deficient number, since it is larger than the sum of its proper divisors (1845087).

201102493 is a wasteful number, since it uses less digits than its factorization.

201102493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845086.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 201102493 is about 14181.0610674942. The cubic root of 201102493 is about 585.8761488541.

Adding to 201102493 its reverse (394201102), we get a palindrome (595303595).

The spelling of 201102493 in words is "two hundred one million, one hundred two thousand, four hundred ninety-three".