400220323231 has 16 divisors (see below), whose sum is σ = 414260352000. Its totient is φ = 386463117600.

The previous prime is 400220323219. The next prime is 400220323273. The reversal of 400220323231 is 132323022004.

It is a cyclic number.

It is not a de Polignac number, because 400220323231 - 2⁵ = 400220323199 is a prime.

It is a super-2 number, since 2×400220323231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400220321231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 958945 + ... + 1311493.

It is an arithmetic number, because the mean of its divisors is an integer number (25891272000).

Almost surely, 2^400220323231 is an apocalyptic number.

400220323231 is a deficient number, since it is larger than the sum of its proper divisors (14040028769).

400220323231 is a wasteful number, since it uses less digits than its factorization.

400220323231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352950.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 400220323231 its reverse (132323022004), we get a palindrome (532543345235).

The spelling of 400220323231 in words is "four hundred billion, two hundred twenty million, three hundred twenty-three thousand, two hundred thirty-one".