201601263 has 4 divisors (see below), whose sum is σ = 268801688. Its totient is φ = 134400840.

The previous prime is 201601261. The next prime is 201601297. The reversal of 201601263 is 362106102.

It is a happy number.

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

It is not a de Polignac number, because 201601263 - 2¹ = 201601261 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 (201601261) 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, 33600208 + ... + 33600213.

It is an arithmetic number, because the mean of its divisors is an integer number (67200422).

Almost surely, 2^201601263 is an apocalyptic number.

201601263 is a deficient number, since it is larger than the sum of its proper divisors (67200425).

201601263 is an equidigital number, since it uses as much as digits as its factorization.

201601263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67200424.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 201601263 is about 14198.6359556121. The cubic root of 201601263 is about 586.3601080383.

Adding to 201601263 its reverse (362106102), we get a palindrome (563707365).

The spelling of 201601263 in words is "two hundred one million, six hundred one thousand, two hundred sixty-three".