402066131 has 4 divisors (see below), whose sum is σ = 411872664. Its totient is φ = 392259600.

The previous prime is 402066083. The next prime is 402066143. The reversal of 402066131 is 131660204.

It is a happy number.

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 402066131 - 2²⁶ = 334957267 is a prime.

It is a super-2 number, since 2×402066131² = 323314347394618322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402066097 and 402066106.

It is not an unprimeable number, because it can be changed into a prime (402066191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4903205 + ... + 4903286.

It is an arithmetic number, because the mean of its divisors is an integer number (102968166).

Almost surely, 2^402066131 is an apocalyptic number.

402066131 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

402066131 is a deficient number, since it is larger than the sum of its proper divisors (9806533).

402066131 is an equidigital number, since it uses as much as digits as its factorization.

402066131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9806532.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 402066131 is about 20051.5867451930. The cubic root of 402066131 is about 738.0727369842.

The spelling of 402066131 in words is "four hundred two million, sixty-six thousand, one hundred thirty-one".