400316231 has 12 divisors (see below), whose sum is σ = 467280072. Its totient is φ = 341944848.

The previous prime is 400316179. The next prime is 400316243. The reversal of 400316231 is 132613004.

It is not a de Polignac number, because 400316231 - 2⁶ = 400316167 is a prime.

It is a super-2 number, since 2×400316231² = 320506169604090722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400316281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 416 + ... + 28298.

It is an arithmetic number, because the mean of its divisors is an integer number (38940006).

Almost surely, 2^400316231 is an apocalyptic number.

400316231 is a deficient number, since it is larger than the sum of its proper divisors (66963841).

400316231 is a wasteful number, since it uses less digits than its factorization.

400316231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28190 (or 28183 counting only the distinct ones).

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

The square root of 400316231 is about 20007.9042130854. The cubic root of 400316231 is about 737.0004160765. Note that the first 3 decimals are identical.

Adding to 400316231 its reverse (132613004), we get a palindrome (532929235).

The spelling of 400316231 in words is "four hundred million, three hundred sixteen thousand, two hundred thirty-one".