1423240331 has 4 divisors (see below), whose sum is σ = 1444482792. Its totient is φ = 1401997872.

The previous prime is 1423240319. The next prime is 1423240333. The reversal of 1423240331 is 1330423241.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1423240331 is a prime.

It is a super-2 number, since 2×1423240331² = 4051226079569979122, 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 = 1423240297 and 1423240306.

It is not an unprimeable number, because it can be changed into a prime (1423240333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10621130 + ... + 10621263.

It is an arithmetic number, because the mean of its divisors is an integer number (361120698).

Almost surely, 2^1423240331 is an apocalyptic number.

1423240331 is a deficient number, since it is larger than the sum of its proper divisors (21242461).

1423240331 is an equidigital number, since it uses as much as digits as its factorization.

1423240331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21242460.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1423240331 is about 37725.8575913126. The cubic root of 1423240331 is about 1124.8451687495.

Adding to 1423240331 its reverse (1330423241), we get a palindrome (2753663572).

The spelling of 1423240331 in words is "one billion, four hundred twenty-three million, two hundred forty thousand, three hundred thirty-one".