201423155 has 16 divisors (see below), whose sum is σ = 245337120. Its totient is φ = 158731008.

The previous prime is 201423127. The next prime is 201423169. The reversal of 201423155 is 551324102.

It is a cyclic number.

It is not a de Polignac number, because 201423155 - 2⁶ = 201423091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201423155.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235709 + ... + 236561.

It is an arithmetic number, because the mean of its divisors is an integer number (15333570).

Almost surely, 2^201423155 is an apocalyptic number.

201423155 is a deficient number, since it is larger than the sum of its proper divisors (43913965).

201423155 is an equidigital number, since it uses as much as digits as its factorization.

201423155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 201423155 is about 14192.3625587849. The cubic root of 201423155 is about 586.1873806212.

Adding to 201423155 its reverse (551324102), we get a palindrome (752747257).

The spelling of 201423155 in words is "two hundred one million, four hundred twenty-three thousand, one hundred fifty-five".