400151641 has 2 divisors, whose sum is σ = 400151642. Its totient is φ = 400151640.

The previous prime is 400151639. The next prime is 400151651. The reversal of 400151641 is 146151004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396806400 + 3345241 = 19920^2 + 1829^2 .

It is a cyclic number.

It is not a de Polignac number, because 400151641 - 2¹ = 400151639 is a prime.

Together with 400151639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (400151651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200075820 + 200075821.

It is an arithmetic number, because the mean of its divisors is an integer number (200075821).

Almost surely, 2^400151641 is an apocalyptic number.

It is an amenable number.

400151641 is a deficient number, since it is larger than the sum of its proper divisors (1).

400151641 is an equidigital number, since it uses as much as digits as its factorization.

400151641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 400151641 is about 20003.7906657713. The cubic root of 400151641 is about 736.8993963348.

The spelling of 400151641 in words is "four hundred million, one hundred fifty-one thousand, six hundred forty-one".