423401331 has 4 divisors (see below), whose sum is σ = 564535112. Its totient is φ = 282267552.

The previous prime is 423401327. The next prime is 423401357. The reversal of 423401331 is 133104324.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 423401331 - 2² = 423401327 is a prime.

It is a super-2 number, since 2×423401331² = 358537374185143122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 423401298 and 423401307.

It is not an unprimeable number, because it can be changed into a prime (423401731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70566886 + ... + 70566891.

It is an arithmetic number, because the mean of its divisors is an integer number (141133778).

Almost surely, 2^423401331 is an apocalyptic number.

423401331 is a deficient number, since it is larger than the sum of its proper divisors (141133781).

423401331 is a wasteful number, since it uses less digits than its factorization.

423401331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141133780.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 423401331 is about 20576.7181785629. The cubic root of 423401331 is about 750.9034038229.

Adding to 423401331 its reverse (133104324), we get a palindrome (556505655).

The spelling of 423401331 in words is "four hundred twenty-three million, four hundred one thousand, three hundred thirty-one".