201550023 has 12 divisors (see below), whose sum is σ = 294400080. Its totient is φ = 132856416.

The previous prime is 201550021. The next prime is 201550031. The reversal of 201550023 is 320055102.

It is a happy number.

It is not a de Polignac number, because 201550023 - 2¹ = 201550021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201549978 and 201550005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201550021) 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, 125011 + ... + 126612.

It is an arithmetic number, because the mean of its divisors is an integer number (24533340).

Almost surely, 2^201550023 is an apocalyptic number.

201550023 is a deficient number, since it is larger than the sum of its proper divisors (92850057).

201550023 is a wasteful number, since it uses less digits than its factorization.

201550023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251718 (or 251715 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 201550023 is about 14196.8314422620. The cubic root of 201550023 is about 586.3104264088.

The spelling of 201550023 in words is "two hundred one million, five hundred fifty thousand, twenty-three".