401806131 has 4 divisors (see below), whose sum is σ = 535741512. Its totient is φ = 267870752.

The previous prime is 401806103. The next prime is 401806151. The reversal of 401806131 is 131608104.

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

It is a cyclic number.

It is not a de Polignac number, because 401806131 - 2⁷ = 401806003 is a prime.

It is a super-2 number, since 2×401806131² = 322896333818378322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401806151) 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 3 ways as a sum of consecutive naturals, for example, 66967686 + ... + 66967691.

It is an arithmetic number, because the mean of its divisors is an integer number (133935378).

Almost surely, 2^401806131 is an apocalyptic number.

401806131 is a deficient number, since it is larger than the sum of its proper divisors (133935381).

401806131 is a wasteful number, since it uses less digits than its factorization.

401806131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133935380.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 401806131 is about 20045.1024192943. The cubic root of 401806131 is about 737.9136086915.

The spelling of 401806131 in words is "four hundred one million, eight hundred six thousand, one hundred thirty-one".