201655123 has 12 divisors (see below), whose sum is σ = 206974240. Its totient is φ = 196454160.

The previous prime is 201655121. The next prime is 201655141. The reversal of 201655123 is 321556102.

It is not a de Polignac number, because 201655123 - 2¹ = 201655121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201655121) 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, 549286 + ... + 549652.

Almost surely, 2^201655123 is an apocalyptic number.

201655123 is a deficient number, since it is larger than the sum of its proper divisors (5319117).

201655123 is an equidigital number, since it uses as much as digits as its factorization.

201655123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 201655123 is about 14200.5324900160. The cubic root of 201655123 is about 586.4123209112.

The spelling of 201655123 in words is "two hundred one million, six hundred fifty-five thousand, one hundred twenty-three".