405205232551 has 4 divisors (see below), whose sum is σ = 463091694352. Its totient is φ = 347318770752.

The previous prime is 405205232501. The next prime is 405205232581. The reversal of 405205232551 is 155232502504.

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 405205232551 - 2¹¹ = 405205230503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405205232501) 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, 28943230890 + ... + 28943230903.

It is an arithmetic number, because the mean of its divisors is an integer number (115772923588).

Almost surely, 2^405205232551 is an apocalyptic number.

405205232551 is a deficient number, since it is larger than the sum of its proper divisors (57886461801).

405205232551 is an equidigital number, since it uses as much as digits as its factorization.

405205232551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57886461800.

The product of its (nonzero) digits is 60000, while the sum is 34.

The spelling of 405205232551 in words is "four hundred five billion, two hundred five million, two hundred thirty-two thousand, five hundred fifty-one".