405053531 has 4 divisors (see below), whose sum is σ = 409064064. Its totient is φ = 401043000.

The previous prime is 405053513. The next prime is 405053549. The reversal of 405053531 is 135350504.

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

It is an interprime number because it is at equal distance from previous prime (405053513) and next prime (405053549).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405053531 is a prime.

It is a super-2 number, since 2×405053531² = 328136725951135922, which contains 22 as substring.

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 405053531.

It is not an unprimeable number, because it can be changed into a prime (405053581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2005115 + ... + 2005316.

It is an arithmetic number, because the mean of its divisors is an integer number (102266016).

Almost surely, 2^405053531 is an apocalyptic number.

405053531 is a deficient number, since it is larger than the sum of its proper divisors (4010533).

405053531 is a wasteful number, since it uses less digits than its factorization.

405053531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4010532.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 405053531 is about 20125.9417419409. The cubic root of 405053531 is about 739.8962180973.

The spelling of 405053531 in words is "four hundred five million, fifty-three thousand, five hundred thirty-one".