201431023 has 4 divisors (see below), whose sum is σ = 203386768. Its totient is φ = 199475280.

The previous prime is 201430981. The next prime is 201431029. The reversal of 201431023 is 320134102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 201431023 - 2⁹ = 201430511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201430988 and 201431006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201431029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 977718 + ... + 977923.

It is an arithmetic number, because the mean of its divisors is an integer number (50846692).

Almost surely, 2^201431023 is an apocalyptic number.

201431023 is a deficient number, since it is larger than the sum of its proper divisors (1955745).

201431023 is a wasteful number, since it uses less digits than its factorization.

201431023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955744.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 201431023 is about 14192.6397474184. The cubic root of 201431023 is about 586.1950130808.

Adding to 201431023 its reverse (320134102), we get a palindrome (521565125).

The spelling of 201431023 in words is "two hundred one million, four hundred thirty-one thousand, twenty-three".