400431113 has 4 divisors (see below), whose sum is σ = 401546880. Its totient is φ = 399315348.

The previous prime is 400431091. The next prime is 400431167. The reversal of 400431113 is 311134004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400431113 - 2⁶ = 400431049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400431091 and 400431100.

It is not an unprimeable number, because it can be changed into a prime (400431193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 557345 + ... + 558062.

It is an arithmetic number, because the mean of its divisors is an integer number (100386720).

Almost surely, 2^400431113 is an apocalyptic number.

It is an amenable number.

400431113 is a deficient number, since it is larger than the sum of its proper divisors (1115767).

400431113 is a wasteful number, since it uses less digits than its factorization.

400431113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115766.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 400431113 is about 20010.7749225261. The cubic root of 400431113 is about 737.0709103319.

Adding to 400431113 its reverse (311134004), we get a palindrome (711565117).

The spelling of 400431113 in words is "four hundred million, four hundred thirty-one thousand, one hundred thirteen".