401238553 has 2 divisors, whose sum is σ = 401238554. Its totient is φ = 401238552.

The previous prime is 401238511. The next prime is 401238557. The reversal of 401238553 is 355832104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212780569 + 188457984 = 14587^2 + 13728^2 .

It is a cyclic number.

It is not a de Polignac number, because 401238553 - 2²¹ = 399141401 is a prime.

It is not a weakly prime, because it can be changed into another prime (401238557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200619276 + 200619277.

It is an arithmetic number, because the mean of its divisors is an integer number (200619277).

Almost surely, 2^401238553 is an apocalyptic number.

It is an amenable number.

401238553 is a deficient number, since it is larger than the sum of its proper divisors (1).

401238553 is an equidigital number, since it uses as much as digits as its factorization.

401238553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 401238553 is about 20030.9398930754. The cubic root of 401238553 is about 737.5659942093.

The spelling of 401238553 in words is "four hundred one million, two hundred thirty-eight thousand, five hundred fifty-three".