400311213023 has 4 divisors (see below), whose sum is σ = 400399217400. Its totient is φ = 400223208648.

The previous prime is 400311213019. The next prime is 400311213041. The reversal of 400311213023 is 320312113004.

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 400311213023 - 2² = 400311213019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400311212986 and 400311213004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400311713023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43995365 + ... + 44004462.

It is an arithmetic number, because the mean of its divisors is an integer number (100099804350).

Almost surely, 2^400311213023 is an apocalyptic number.

400311213023 is a deficient number, since it is larger than the sum of its proper divisors (88004377).

400311213023 is an equidigital number, since it uses as much as digits as its factorization.

400311213023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88004376.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 400311213023 its reverse (320312113004), we get a palindrome (720623326027).

The spelling of 400311213023 in words is "four hundred billion, three hundred eleven million, two hundred thirteen thousand, twenty-three".