405551115 has 12 divisors (see below), whose sum is σ = 702955344. Its totient is φ = 216293904.

The previous prime is 405551101. The next prime is 405551129. The reversal of 405551115 is 511155504.

It is an interprime number because it is at equal distance from previous prime (405551101) and next prime (405551129).

It is not a de Polignac number, because 405551115 - 2¹⁶ = 405485579 is a prime.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 4506079 + ... + 4506168.

It is an arithmetic number, because the mean of its divisors is an integer number (58579612).

Almost surely, 2^405551115 is an apocalyptic number.

405551115 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

405551115 is a deficient number, since it is larger than the sum of its proper divisors (297404229).

405551115 is a wasteful number, since it uses less digits than its factorization.

405551115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9012258 (or 9012255 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 27.

The square root of 405551115 is about 20138.2997047914. The cubic root of 405551115 is about 740.1990668486.

The spelling of 405551115 in words is "four hundred five million, five hundred fifty-one thousand, one hundred fifteen".