405135131 has 4 divisors (see below), whose sum is σ = 411181992. Its totient is φ = 399088272.

The previous prime is 405135103. The next prime is 405135169. The reversal of 405135131 is 131531504.

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 405135131 - 2⁶ = 405135067 is a prime.

It is a super-2 number, since 2×405135131² = 328268948740774322, 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 = 405135097 and 405135106.

It is not an unprimeable number, because it can be changed into a prime (405135431) 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, 3023330 + ... + 3023463.

It is an arithmetic number, because the mean of its divisors is an integer number (102795498).

Almost surely, 2^405135131 is an apocalyptic number.

405135131 is a deficient number, since it is larger than the sum of its proper divisors (6046861).

405135131 is an equidigital number, since it uses as much as digits as its factorization.

405135131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6046860.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 405135131 is about 20127.9688741810. The cubic root of 405135131 is about 739.9458999894.

Adding to 405135131 its reverse (131531504), we get a palindrome (536666635).

The spelling of 405135131 in words is "four hundred five million, one hundred thirty-five thousand, one hundred thirty-one".