2001263137 has 4 divisors (see below), whose sum is σ = 2118984516. Its totient is φ = 1883541760.

The previous prime is 2001263123. The next prime is 2001263153. The reversal of 2001263137 is 7313621002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 992502016 + 1008761121 = 31504^2 + 31761^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001263137 - 2¹⁵ = 2001230369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001263237) 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, 58860664 + ... + 58860697.

It is an arithmetic number, because the mean of its divisors is an integer number (529746129).

Almost surely, 2^2001263137 is an apocalyptic number.

It is an amenable number.

2001263137 is a deficient number, since it is larger than the sum of its proper divisors (117721379).

2001263137 is a wasteful number, since it uses less digits than its factorization.

2001263137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117721378.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 2001263137 is about 44735.4796218840. The cubic root of 2001263137 is about 1260.1862362241.

Adding to 2001263137 its reverse (7313621002), we get a palindrome (9314884139).

The spelling of 2001263137 in words is "two billion, one million, two hundred sixty-three thousand, one hundred thirty-seven".