401232281 has 2 divisors, whose sum is σ = 401232282. Its totient is φ = 401232280.

The previous prime is 401232241. The next prime is 401232301. The reversal of 401232281 is 182232104.

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., 400200025 + 1032256 = 20005^2 + 1016^2 .

It is a cyclic number.

It is not a de Polignac number, because 401232281 - 2¹⁴ = 401215897 is a prime.

It is a super-2 number, since 2×401232281² = 321974686632925922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (401232241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200616140 + 200616141.

It is an arithmetic number, because the mean of its divisors is an integer number (200616141).

Almost surely, 2^401232281 is an apocalyptic number.

It is an amenable number.

401232281 is a deficient number, since it is larger than the sum of its proper divisors (1).

401232281 is an equidigital number, since it uses as much as digits as its factorization.

401232281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 401232281 is about 20030.7833346577. The cubic root of 401232281 is about 737.5621510775.

Adding to 401232281 its reverse (182232104), we get a palindrome (583464385).

It can be divided in two parts, 40 and 1232281, that added together give a palindrome (1232321).

The spelling of 401232281 in words is "four hundred one million, two hundred thirty-two thousand, two hundred eighty-one".