400554851 has 2 divisors, whose sum is σ = 400554852. Its totient is φ = 400554850.

The previous prime is 400554823. The next prime is 400554881. The reversal of 400554851 is 158455004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400554851 - 2¹⁰ = 400553827 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (400554811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200277425 + 200277426.

It is an arithmetic number, because the mean of its divisors is an integer number (200277426).

Almost surely, 2^400554851 is an apocalyptic number.

400554851 is a deficient number, since it is larger than the sum of its proper divisors (1).

400554851 is an equidigital number, since it uses as much as digits as its factorization.

400554851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 400554851 is about 20013.8664680266. The cubic root of 400554851 is about 737.1468237533.

The spelling of 400554851 in words is "four hundred million, five hundred fifty-four thousand, eight hundred fifty-one".