423215505 has 24 divisors (see below), whose sum is σ = 736206120. Its totient is φ = 224904960.

The previous prime is 423215497. The next prime is 423215537. The reversal of 423215505 is 505512324.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42146064 + 381069441 = 6492^2 + 19521^2 .

It is not a de Polignac number, because 423215505 - 2³ = 423215497 is a prime.

It is a super-2 number, since 2×423215505² = 358222727344810050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 4090 + ... + 29379.

It is an arithmetic number, because the mean of its divisors is an integer number (30675255).

Almost surely, 2^423215505 is an apocalyptic number.

423215505 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

423215505 is a deficient number, since it is larger than the sum of its proper divisors (312990615).

423215505 is a wasteful number, since it uses less digits than its factorization.

423215505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33761 (or 33758 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 423215505 is about 20572.2022399159. The cubic root of 423215505 is about 750.7935334435.

Adding to 423215505 its reverse (505512324), we get a palindrome (928727829).

The spelling of 423215505 in words is "four hundred twenty-three million, two hundred fifteen thousand, five hundred five".