1423144431 has 16 divisors (see below), whose sum is σ = 2165346400. Its totient is φ = 923120064.

The previous prime is 1423144427. The next prime is 1423144433. The reversal of 1423144431 is 1344413241.

It is not a de Polignac number, because 1423144431 - 2² = 1423144427 is a prime.

It is a super-2 number, since 2×1423144431² = 4050680142972627522, which contains 22 as substring.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1423144395 and 1423144404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423144433) 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, 711286 + ... + 713283.

It is an arithmetic number, because the mean of its divisors is an integer number (135334150).

Almost surely, 2^1423144431 is an apocalyptic number.

1423144431 is a deficient number, since it is larger than the sum of its proper divisors (742201969).

1423144431 is a wasteful number, since it uses less digits than its factorization.

1423144431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424615 (or 1424609 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 1423144431 is about 37724.5865583707. The cubic root of 1423144431 is about 1124.8199036151.

Adding to 1423144431 its reverse (1344413241), we get a palindrome (2767557672).

The spelling of 1423144431 in words is "one billion, four hundred twenty-three million, one hundred forty-four thousand, four hundred thirty-one".