266032021 has 2 divisors, whose sum is σ = 266032022. Its totient is φ = 266032020.

The previous prime is 266032001. The next prime is 266032037. The reversal of 266032021 is 120230662.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 251698225 + 14333796 = 15865^2 + 3786^2 .

It is a cyclic number.

It is not a de Polignac number, because 266032021 - 2⁵ = 266031989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 266031983 and 266032001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266032001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133016010 + 133016011.

It is an arithmetic number, because the mean of its divisors is an integer number (133016011).

Almost surely, 2^266032021 is an apocalyptic number.

It is an amenable number.

266032021 is a deficient number, since it is larger than the sum of its proper divisors (1).

266032021 is an equidigital number, since it uses as much as digits as its factorization.

266032021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 266032021 is about 16310.4880674982. The cubic root of 266032021 is about 643.1485644106.

Adding to 266032021 its reverse (120230662), we get a palindrome (386262683).

The spelling of 266032021 in words is "two hundred sixty-six million, thirty-two thousand, twenty-one".