401321055 has 16 divisors (see below), whose sum is σ = 659469024. Its totient is φ = 208252800.

The previous prime is 401321051. The next prime is 401321093. The reversal of 401321055 is 550123104.

It is not a de Polignac number, because 401321055 - 2² = 401321051 is a prime.

It is a super-2 number, since 2×401321055² = 322117178372626050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401321051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360996 + ... + 362105.

It is an arithmetic number, because the mean of its divisors is an integer number (41216814).

Almost surely, 2^401321055 is an apocalyptic number.

401321055 is a deficient number, since it is larger than the sum of its proper divisors (258147969).

401321055 is a wasteful number, since it uses less digits than its factorization.

401321055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723146.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 401321055 is about 20032.9991514002. Note that the first 3 decimals coincide. The cubic root of 401321055 is about 737.6165431068.

Adding to 401321055 its reverse (550123104), we get a palindrome (951444159).

The spelling of 401321055 in words is "four hundred one million, three hundred twenty-one thousand, fifty-five".