400321191031 has 2 divisors, whose sum is σ = 400321191032. Its totient is φ = 400321191030.

The previous prime is 400321190987. The next prime is 400321191041. The reversal of 400321191031 is 130191123004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400321191031 - 2¹¹ = 400321188983 is a prime.

It is a super-2 number, since 2×400321191031² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400321190987 and 400321191005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400321191041) 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 as a sum of consecutive naturals, namely, 200160595515 + 200160595516.

It is an arithmetic number, because the mean of its divisors is an integer number (200160595516).

Almost surely, 2^400321191031 is an apocalyptic number.

400321191031 is a deficient number, since it is larger than the sum of its proper divisors (1).

400321191031 is an equidigital number, since it uses as much as digits as its factorization.

400321191031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 400321191031 in words is "four hundred billion, three hundred twenty-one million, one hundred ninety-one thousand, thirty-one".