423322515 has 144 divisors (see below), whose sum is σ = 962896896. Its totient is φ = 169948800.

The previous prime is 423322511. The next prime is 423322531. The reversal of 423322515 is 515223324.

It is a happy number.

423322515 is a `hidden beast` number, since 423 + 3 + 225 + 15 = 666.

It is not a de Polignac number, because 423322515 - 2² = 423322511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (423322511) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 751624 + ... + 752186.

It is an arithmetic number, because the mean of its divisors is an integer number (6686784).

Almost surely, 2^423322515 is an apocalyptic number.

423322515 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

423322515 is an abundant number, since it is smaller than the sum of its proper divisors (539574381).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

423322515 is a wasteful number, since it uses less digits than its factorization.

423322515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630 (or 620 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 423322515 is about 20574.8029152165. The cubic root of 423322515 is about 750.8568074685.

Adding to 423322515 its reverse (515223324), we get a palindrome (938545839).

The spelling of 423322515 in words is "four hundred twenty-three million, three hundred twenty-two thousand, five hundred fifteen".