405055551 has 8 divisors (see below), whose sum is σ = 545421744. Its totient is φ = 267363200.

The previous prime is 405055543. The next prime is 405055561. The reversal of 405055551 is 155550504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 405055551 - 2³ = 405055543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405055561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 668106 + ... + 668711.

It is an arithmetic number, because the mean of its divisors is an integer number (68177718).

Almost surely, 2^405055551 is an apocalyptic number.

405055551 is a deficient number, since it is larger than the sum of its proper divisors (140366193).

405055551 is a wasteful number, since it uses less digits than its factorization.

405055551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336921.

The product of its (nonzero) digits is 12500, while the sum is 30.

The square root of 405055551 is about 20125.9919258654. The cubic root of 405055551 is about 739.8974480482.

It can be divided in two parts, 40505 and 5551, that added together give a triangular number (46056 = T₃₀₃).

The spelling of 405055551 in words is "four hundred five million, fifty-five thousand, five hundred fifty-one".