423431145 has 48 divisors (see below), whose sum is σ = 781784640. Its totient is φ = 219703104.

The previous prime is 423431143. The next prime is 423431153. The reversal of 423431145 is 541134324.

It is a happy number.

It is not a de Polignac number, because 423431145 - 2¹ = 423431143 is a prime.

It is a super-2 number, since 2×423431145² = 358587869112022050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (423431143) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40246 + ... + 49664.

It is an arithmetic number, because the mean of its divisors is an integer number (16287180).

Almost surely, 2^423431145 is an apocalyptic number.

423431145 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

423431145 is a deficient number, since it is larger than the sum of its proper divisors (358353495).

423431145 is an equidigital number, since it uses as much as digits as its factorization.

423431145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9476 (or 9464 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 423431145 is about 20577.4426253604. The cubic root of 423431145 is about 750.9210284791.

Adding to 423431145 its reverse (541134324), we get a palindrome (964565469).

The spelling of 423431145 in words is "four hundred twenty-three million, four hundred thirty-one thousand, one hundred forty-five".