266020131 has 16 divisors (see below), whose sum is σ = 404447904. Its totient is φ = 154074624.

The previous prime is 266020129. The next prime is 266020151. The reversal of 266020131 is 131020662.

It is a happy number.

It is not a de Polignac number, because 266020131 - 2¹ = 266020129 is a prime.

It is a super-2 number, since 2×266020131² = 141533420194514322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 266020098 and 266020107.

It is not an unprimeable number, because it can be changed into a prime (266020151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199956 + ... + 201281.

It is an arithmetic number, because the mean of its divisors is an integer number (25277994).

Almost surely, 2^266020131 is an apocalyptic number.

266020131 is a deficient number, since it is larger than the sum of its proper divisors (138427773).

266020131 is a wasteful number, since it uses less digits than its factorization.

266020131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401270.

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

The square root of 266020131 is about 16310.1235740260. The cubic root of 266020131 is about 643.1389826689.

Adding to 266020131 its reverse (131020662), we get a palindrome (397040793).

It can be divided in two parts, 2660 and 20131, that added together give a triangular number (22791 = T₂₁₃).

The spelling of 266020131 in words is "two hundred sixty-six million, twenty thousand, one hundred thirty-one".