234521431 has 2 divisors, whose sum is σ = 234521432. Its totient is φ = 234521430.

The previous prime is 234521411. The next prime is 234521437. The reversal of 234521431 is 134125432.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 234521431 - 2¹⁵ = 234488663 is a prime.

It is a super-2 number, since 2×234521431² = 110000603196575522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 234521396 and 234521405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234521437) 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 as a sum of consecutive naturals, namely, 117260715 + 117260716.

It is an arithmetic number, because the mean of its divisors is an integer number (117260716).

Almost surely, 2^234521431 is an apocalyptic number.

234521431 is a deficient number, since it is larger than the sum of its proper divisors (1).

234521431 is an equidigital number, since it uses as much as digits as its factorization.

234521431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 25.

The square root of 234521431 is about 15314.0925620815. The cubic root of 234521431 is about 616.6813935936.

Adding to 234521431 its reverse (134125432), we get a palindrome (368646863).

The spelling of 234521431 in words is "two hundred thirty-four million, five hundred twenty-one thousand, four hundred thirty-one".