234431421 has 16 divisors (see below), whose sum is σ = 362262528. Its totient is φ = 132073200.

The previous prime is 234431413. The next prime is 234431437. The reversal of 234431421 is 124134432.

It is not a de Polignac number, because 234431421 - 2³ = 234431413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 234431391 and 234431400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234431221) 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, 77125 + ... + 80106.

It is an arithmetic number, because the mean of its divisors is an integer number (22641408).

Almost surely, 2^234431421 is an apocalyptic number.

234431421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

234431421 is a deficient number, since it is larger than the sum of its proper divisors (127831107).

234431421 is a wasteful number, since it uses less digits than its factorization.

234431421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157312.

The product of its digits is 2304, while the sum is 24.

The square root of 234431421 is about 15311.1534836537. The cubic root of 234431421 is about 616.6024888004.

Adding to 234431421 its reverse (124134432), we get a palindrome (358565853).

The spelling of 234431421 in words is "two hundred thirty-four million, four hundred thirty-one thousand, four hundred twenty-one".