405020313431 has 16 divisors (see below), whose sum is σ = 421071955200. Its totient is φ = 389164892160.

The previous prime is 405020313427. The next prime is 405020313517. The reversal of 405020313431 is 134313020504.

It is a cyclic number.

It is not a de Polignac number, because 405020313431 - 2² = 405020313427 is a prime.

It is a super-2 number, since 2×405020313431² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 405020313431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405020313421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2470295 + ... + 2629143.

It is an arithmetic number, because the mean of its divisors is an integer number (26316997200).

Almost surely, 2^405020313431 is an apocalyptic number.

405020313431 is a deficient number, since it is larger than the sum of its proper divisors (16051641769).

405020313431 is a wasteful number, since it uses less digits than its factorization.

405020313431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159466.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 405020313431 its reverse (134313020504), we get a palindrome (539333333935).

The spelling of 405020313431 in words is "four hundred five billion, twenty million, three hundred thirteen thousand, four hundred thirty-one".