202381 has 2 divisors, whose sum is σ = 202382. Its totient is φ = 202380.

The previous prime is 202361. The next prime is 202387. The reversal of 202381 is 183202.

It is a happy number.

202381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198025 + 4356 = 445^2 + 66^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202381 is a prime.

It is a super-2 number, since 2×202381² = 81916138322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101190 + 101191.

It is an arithmetic number, because the mean of its divisors is an integer number (101191).

2²⁰²³⁸¹ is an apocalyptic number.

It is an amenable number.

202381 is a deficient number, since it is larger than the sum of its proper divisors (1).

202381 is an equidigital number, since it uses as much as digits as its factorization.

202381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 202381 is about 449.8677583468. The cubic root of 202381 is about 58.7115094191.

Adding to 202381 its reverse (183202), we get a palindrome (385583).

It can be divided in two parts, 20 and 2381, that added together give a 4-th power (2401 = 7⁴).

The spelling of 202381 in words is "two hundred two thousand, three hundred eighty-one".