401033821 has 2 divisors, whose sum is σ = 401033822. Its totient is φ = 401033820.

The previous prime is 401033777. The next prime is 401033827. The reversal of 401033821 is 128330104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 279725625 + 121308196 = 16725^2 + 11014^2 .

It is a cyclic number.

It is not a de Polignac number, because 401033821 - 2¹¹ = 401031773 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 401033792 and 401033801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401033827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200516910 + 200516911.

It is an arithmetic number, because the mean of its divisors is an integer number (200516911).

Almost surely, 2^401033821 is an apocalyptic number.

It is an amenable number.

401033821 is a deficient number, since it is larger than the sum of its proper divisors (1).

401033821 is an equidigital number, since it uses as much as digits as its factorization.

401033821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 401033821 is about 20025.8288467669. The cubic root of 401033821 is about 737.4405251665.

Adding to 401033821 its reverse (128330104), we get a palindrome (529363925).

The spelling of 401033821 in words is "four hundred one million, thirty-three thousand, eight hundred twenty-one".