401305231 has 4 divisors (see below), whose sum is σ = 402001312. Its totient is φ = 400609152.

The previous prime is 401305217. The next prime is 401305279. The reversal of 401305231 is 132503104.

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

It is a cyclic number.

It is not a de Polignac number, because 401305231 - 2¹¹ = 401303183 is a prime.

It is a super-2 number, since 2×401305231² = 322091776855926722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401305199 and 401305208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401305831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347175 + ... + 348328.

It is an arithmetic number, because the mean of its divisors is an integer number (100500328).

Almost surely, 2^401305231 is an apocalyptic number.

401305231 is a deficient number, since it is larger than the sum of its proper divisors (696081).

401305231 is an equidigital number, since it uses as much as digits as its factorization.

401305231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696080.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 401305231 is about 20032.6041991549. The cubic root of 401305231 is about 737.6068482940.

Adding to 401305231 its reverse (132503104), we get a palindrome (533808335).

The spelling of 401305231 in words is "four hundred one million, three hundred five thousand, two hundred thirty-one".