406212731 has 2 divisors, whose sum is σ = 406212732. Its totient is φ = 406212730.

The previous prime is 406212721. The next prime is 406212749. The reversal of 406212731 is 137212604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 406212731 - 2¹⁴ = 406196347 is a prime.

It is a super-2 number, since 2×406212731² = 330017565652956722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 406212731.

It is not a weakly prime, because it can be changed into another prime (406212721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203106365 + 203106366.

It is an arithmetic number, because the mean of its divisors is an integer number (203106366).

Almost surely, 2^406212731 is an apocalyptic number.

406212731 is a deficient number, since it is larger than the sum of its proper divisors (1).

406212731 is an equidigital number, since it uses as much as digits as its factorization.

406212731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 406212731 is about 20154.7198194368. The cubic root of 406212731 is about 740.6013683547.

The spelling of 406212731 in words is "four hundred six million, two hundred twelve thousand, seven hundred thirty-one".