401444651 has 4 divisors (see below), whose sum is σ = 415287600. Its totient is φ = 387601704.

The previous prime is 401444623. The next prime is 401444657. The reversal of 401444651 is 156444104.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 401444651 - 2¹⁴ = 401428267 is a prime.

It is a super-2 number, since 2×401444651² = 322315615633023602, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 13842919 = 401444651 / (4 + 0 + 1 + 4 + 4 + 4 + 6 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401444657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6921431 + ... + 6921488.

It is an arithmetic number, because the mean of its divisors is an integer number (103821900).

Almost surely, 2^401444651 is an apocalyptic number.

401444651 is a deficient number, since it is larger than the sum of its proper divisors (13842949).

401444651 is a wasteful number, since it uses less digits than its factorization.

401444651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13842948.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 401444651 is about 20036.0837241213. The cubic root of 401444651 is about 737.6922572977.

Adding to 401444651 its reverse (156444104), we get a palindrome (557888755).

The spelling of 401444651 in words is "four hundred one million, four hundred forty-four thousand, six hundred fifty-one".