401333655 has 8 divisors (see below), whose sum is σ = 642133872. Its totient is φ = 214044608.

The previous prime is 401333651. The next prime is 401333683. The reversal of 401333655 is 556333104.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 401333655 - 2² = 401333651 is a prime.

It is a super-2 number, since 2×401333655² = 322137405271318050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401333651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13377774 + ... + 13377803.

It is an arithmetic number, because the mean of its divisors is an integer number (80266734).

Almost surely, 2^401333655 is an apocalyptic number.

401333655 is a deficient number, since it is larger than the sum of its proper divisors (240800217).

401333655 is a wasteful number, since it uses less digits than its factorization.

401333655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26755585.

The product of its (nonzero) digits is 16200, while the sum is 30.

The square root of 401333655 is about 20033.3136300513. The cubic root of 401333655 is about 737.6242625051.

Adding to 401333655 its reverse (556333104), we get a palindrome (957666759).

The spelling of 401333655 in words is "four hundred one million, three hundred thirty-three thousand, six hundred fifty-five".