401311243 has 4 divisors (see below), whose sum is σ = 401384880. Its totient is φ = 401237608.

The previous prime is 401311219. The next prime is 401311247. The reversal of 401311243 is 342113104.

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 401311243 - 2⁹ = 401310731 is a prime.

It is a super-2 number, since 2×401311243² = 322101427516410098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401311243.

It is not an unprimeable number, because it can be changed into a prime (401311247) 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, 27928 + ... + 39781.

It is an arithmetic number, because the mean of its divisors is an integer number (100346220).

Almost surely, 2^401311243 is an apocalyptic number.

401311243 is a deficient number, since it is larger than the sum of its proper divisors (73637).

401311243 is an equidigital number, since it uses as much as digits as its factorization.

401311243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73636.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 401311243 is about 20032.7542539712. The cubic root of 401311243 is about 737.6105316667.

Adding to 401311243 its reverse (342113104), we get a palindrome (743424347).

The spelling of 401311243 in words is "four hundred one million, three hundred eleven thousand, two hundred forty-three".