400546213 has 2 divisors, whose sum is σ = 400546214. Its totient is φ = 400546212.

The previous prime is 400546207. The next prime is 400546229. The reversal of 400546213 is 312645004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 316768804 + 83777409 = 17798^2 + 9153^2 .

It is a cyclic number.

It is not a de Polignac number, because 400546213 - 2⁹ = 400545701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400546243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200273106 + 200273107.

It is an arithmetic number, because the mean of its divisors is an integer number (200273107).

Almost surely, 2^400546213 is an apocalyptic number.

It is an amenable number.

400546213 is a deficient number, since it is larger than the sum of its proper divisors (1).

400546213 is an equidigital number, since it uses as much as digits as its factorization.

400546213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 400546213 is about 20013.6506664826. The cubic root of 400546213 is about 737.1415248369.

The spelling of 400546213 in words is "four hundred million, five hundred forty-six thousand, two hundred thirteen".