405155404231 has 4 divisors (see below), whose sum is σ = 405218041000. Its totient is φ = 405092767464.

The previous prime is 405155404187. The next prime is 405155404237. The reversal of 405155404231 is 132404551504.

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 405155404231 - 2¹³ = 405155396039 is a prime.

It is a super-2 number, since 2×405155404231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405155404237) 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, 31308681 + ... + 31321618.

It is an arithmetic number, because the mean of its divisors is an integer number (101304510250).

Almost surely, 2^405155404231 is an apocalyptic number.

405155404231 is a deficient number, since it is larger than the sum of its proper divisors (62636769).

405155404231 is an equidigital number, since it uses as much as digits as its factorization.

405155404231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62636768.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 405155404231 its reverse (132404551504), we get a palindrome (537559955735).

The spelling of 405155404231 in words is "four hundred five billion, one hundred fifty-five million, four hundred four thousand, two hundred thirty-one".