406433131 has 4 divisors (see below), whose sum is σ = 437697232. Its totient is φ = 375169032.

The previous prime is 406433129. The next prime is 406433141. The reversal of 406433131 is 131334604.

It is a happy number.

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 406433131 - 2¹ = 406433129 is a prime.

It is a super-2 number, since 2×406433131² = 330375779948926322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 406433096 and 406433105.

It is not an unprimeable number, because it can be changed into a prime (406433141) 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, 15632031 + ... + 15632056.

It is an arithmetic number, because the mean of its divisors is an integer number (109424308).

Almost surely, 2^406433131 is an apocalyptic number.

406433131 is a deficient number, since it is larger than the sum of its proper divisors (31264101).

406433131 is a wasteful number, since it uses less digits than its factorization.

406433131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31264100.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 406433131 is about 20160.1867798887. The cubic root of 406433131 is about 740.7352875362.

Adding to 406433131 its reverse (131334604), we get a palindrome (537767735).

The spelling of 406433131 in words is "four hundred six million, four hundred thirty-three thousand, one hundred thirty-one".