201423231 has 6 divisors (see below), whose sum is σ = 290944680. Its totient is φ = 134282148.

The previous prime is 201423197. The next prime is 201423251. The reversal of 201423231 is 132324102.

It is not a de Polignac number, because 201423231 - 2¹¹ = 201421183 is a prime.

It is a super-2 number, since 2×201423231² = 81142635972958722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201423251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11190171 + ... + 11190188.

It is an arithmetic number, because the mean of its divisors is an integer number (48490780).

Almost surely, 2^201423231 is an apocalyptic number.

201423231 is a deficient number, since it is larger than the sum of its proper divisors (89521449).

201423231 is a wasteful number, since it uses less digits than its factorization.

201423231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22380365 (or 22380362 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 201423231 is about 14192.3652362811. The cubic root of 201423231 is about 586.1874543470.

Adding to 201423231 its reverse (132324102), we get a palindrome (333747333).

The spelling of 201423231 in words is "two hundred one million, four hundred twenty-three thousand, two hundred thirty-one".