401445553 has 2 divisors, whose sum is σ = 401445554. Its totient is φ = 401445552.

The previous prime is 401445529. The next prime is 401445557. The reversal of 401445553 is 355544104.

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., 386830224 + 14615329 = 19668^2 + 3823^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401445553 is a prime.

It is a super-2 number, since 2×401445553² = 322317064046951618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (401445557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200722776 + 200722777.

It is an arithmetic number, because the mean of its divisors is an integer number (200722777).

Almost surely, 2^401445553 is an apocalyptic number.

It is an amenable number.

401445553 is a deficient number, since it is larger than the sum of its proper divisors (1).

401445553 is an equidigital number, since it uses as much as digits as its factorization.

401445553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 401445553 is about 20036.1062334976. The cubic root of 401445553 is about 737.6928098006.

Adding to 401445553 its reverse (355544104), we get a palindrome (756989657).

The spelling of 401445553 in words is "four hundred one million, four hundred forty-five thousand, five hundred fifty-three".