423145500 has 48 divisors (see below), whose sum is σ = 1232204064. Its totient is φ = 112838400.

The previous prime is 423145493. The next prime is 423145501. The reversal of 423145500 is 5541324.

It is a super-2 number, since 2×423145500² = 358104228340500000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423145501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139549 + ... + 142548.

It is an arithmetic number, because the mean of its divisors is an integer number (25670918).

Almost surely, 2^423145500 is an apocalyptic number.

It is an amenable number.

423145500 is an abundant number, since it is smaller than the sum of its proper divisors (809058564).

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

423145500 is a wasteful number, since it uses less digits than its factorization.

423145500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282119 (or 282107 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 423145500 is about 20570.5007231229. The cubic root of 423145500 is about 750.7521343620.

Adding to 423145500 its reverse (5541324), we get a palindrome (428686824).

The spelling of 423145500 in words is "four hundred twenty-three million, one hundred forty-five thousand, five hundred".