201280031 has 4 divisors (see below), whose sum is σ = 201308712. Its totient is φ = 201251352.

The previous prime is 201280003. The next prime is 201280043. The reversal of 201280031 is 130082102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 130082102 = 2 ⋅65041051.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201280031 is a prime.

It is a super-2 number, since 2×201280031² = 81027301758721922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201279991 and 201280009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201280081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4040 + ... + 20466.

It is an arithmetic number, because the mean of its divisors is an integer number (50327178).

Almost surely, 2^201280031 is an apocalyptic number.

201280031 is a deficient number, since it is larger than the sum of its proper divisors (28681).

201280031 is a wasteful number, since it uses less digits than its factorization.

201280031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28680.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 201280031 is about 14187.3193732995. The cubic root of 201280031 is about 586.0485065478.

The spelling of 201280031 in words is "two hundred one million, two hundred eighty thousand, thirty-one".