401051815 has 8 divisors (see below), whose sum is σ = 481411008. Its totient is φ = 320742240.

The previous prime is 401051813. The next prime is 401051837. The reversal of 401051815 is 518150104.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 401051815 - 2¹ = 401051813 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401051815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401051813) 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 in 7 ways as a sum of consecutive naturals, for example, 8625 + ... + 29605.

It is an arithmetic number, because the mean of its divisors is an integer number (60176376).

Almost surely, 2^401051815 is an apocalyptic number.

401051815 is a deficient number, since it is larger than the sum of its proper divisors (80359193).

401051815 is a wasteful number, since it uses less digits than its factorization.

401051815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24809.

The product of its (nonzero) digits is 800, while the sum is 25.

The square root of 401051815 is about 20026.2781115214. The cubic root of 401051815 is about 737.4515544161.

The spelling of 401051815 in words is "four hundred one million, fifty-one thousand, eight hundred fifteen".