406543631 has 16 divisors (see below), whose sum is σ = 442702848. Its totient is φ = 371109600.

The previous prime is 406543619. The next prime is 406543633. The reversal of 406543631 is 136345604.

It is a cyclic number.

It is not a de Polignac number, because 406543631 - 2⁶ = 406543567 is a prime.

It is a super-2 number, since 2×406543631² = 330555447813328322, which 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 (406543633) 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, 587996 + ... + 588686.

It is an arithmetic number, because the mean of its divisors is an integer number (27668928).

Almost surely, 2^406543631 is an apocalyptic number.

406543631 is a deficient number, since it is larger than the sum of its proper divisors (36159217).

406543631 is a wasteful number, since it uses less digits than its factorization.

406543631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 406543631 is about 20162.9271436466. The cubic root of 406543631 is about 740.8024111918.

The spelling of 406543631 in words is "four hundred six million, five hundred forty-three thousand, six hundred thirty-one".