401233555 has 4 divisors (see below), whose sum is σ = 481480272. Its totient is φ = 320986840.

The previous prime is 401233549. The next prime is 401233577. The reversal of 401233555 is 555332104.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-401233555 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 40123351 + ... + 40123360.

It is an arithmetic number, because the mean of its divisors is an integer number (120370068).

Almost surely, 2^401233555 is an apocalyptic number.

401233555 is a deficient number, since it is larger than the sum of its proper divisors (80246717).

401233555 is an equidigital number, since it uses as much as digits as its factorization.

401233555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80246716.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 401233555 is about 20030.8151356853. The cubic root of 401233555 is about 737.5629317169.

Adding to 401233555 its reverse (555332104), we get a palindrome (956565659).

The spelling of 401233555 in words is "four hundred one million, two hundred thirty-three thousand, five hundred fifty-five".