401818311 has 12 divisors (see below), whose sum is σ = 599127360. Its totient is φ = 259237440.

The previous prime is 401818301. The next prime is 401818321. The reversal of 401818311 is 113818104.

It is an interprime number because it is at equal distance from previous prime (401818301) and next prime (401818321).

It is not a de Polignac number, because 401818311 - 2⁶ = 401818247 is a prime.

It is a super-2 number, since 2×401818311² = 322915910109785442, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401818301) 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 11 ways as a sum of consecutive naturals, for example, 719826 + ... + 720383.

It is an arithmetic number, because the mean of its divisors is an integer number (49927280).

Almost surely, 2^401818311 is an apocalyptic number.

401818311 is a deficient number, since it is larger than the sum of its proper divisors (197309049).

401818311 is a wasteful number, since it uses less digits than its factorization.

401818311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440246 (or 1440243 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 401818311 is about 20045.4062318527. The cubic root of 401818311 is about 737.9210647723.

The spelling of 401818311 in words is "four hundred one million, eight hundred eighteen thousand, three hundred eleven".