201423013 has 6 divisors (see below), whose sum is σ = 221398982. Its totient is φ = 183111720.

The previous prime is 201422981. The next prime is 201423023. The reversal of 201423013 is 310324102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 152324964 + 49098049 = 12342^2 + 7007^2 .

It is not a de Polignac number, because 201423013 - 2⁵ = 201422981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201423023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 832206 + ... + 832447.

Almost surely, 2^201423013 is an apocalyptic number.

It is an amenable number.

201423013 is a deficient number, since it is larger than the sum of its proper divisors (19975969).

201423013 is a wasteful number, since it uses less digits than its factorization.

201423013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664675 (or 1664664 counting only the distinct ones).

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

The square root of 201423013 is about 14192.3575560933. The cubic root of 201423013 is about 586.1872428704.

Adding to 201423013 its reverse (310324102), we get a palindrome (511747115).

The spelling of 201423013 in words is "two hundred one million, four hundred twenty-three thousand, thirteen".