400112311 has 4 divisors (see below), whose sum is σ = 400207824. Its totient is φ = 400016800.

The previous prime is 400112309. The next prime is 400112329. The reversal of 400112311 is 113211004.

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 400112311 - 2¹ = 400112309 is a prime.

It is a super-2 number, since 2×400112311² = 320179722827521442, 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 = 400112291 and 400112300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400112411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41170 + ... + 49951.

It is an arithmetic number, because the mean of its divisors is an integer number (100051956).

Almost surely, 2^400112311 is an apocalyptic number.

400112311 is a deficient number, since it is larger than the sum of its proper divisors (95513).

400112311 is an equidigital number, since it uses as much as digits as its factorization.

400112311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95512.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 400112311 is about 20002.8075779377. The cubic root of 400112311 is about 736.8752528186.

Adding to 400112311 its reverse (113211004), we get a palindrome (513323315).

The spelling of 400112311 in words is "four hundred million, one hundred twelve thousand, three hundred eleven".