233532421 has 2 divisors, whose sum is σ = 233532422. Its totient is φ = 233532420.

The previous prime is 233532413. The next prime is 233532437. The reversal of 233532421 is 124235332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159744321 + 73788100 = 12639^2 + 8590^2 .

It is a cyclic number.

It is not a de Polignac number, because 233532421 - 2³ = 233532413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233532821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116766210 + 116766211.

It is an arithmetic number, because the mean of its divisors is an integer number (116766211).

Almost surely, 2^233532421 is an apocalyptic number.

It is an amenable number.

233532421 is a deficient number, since it is larger than the sum of its proper divisors (1).

233532421 is an equidigital number, since it uses as much as digits as its factorization.

233532421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 25.

The square root of 233532421 is about 15281.7676006410. The cubic root of 233532421 is about 615.8132946352.

Adding to 233532421 its reverse (124235332), we get a palindrome (357767753).

The spelling of 233532421 in words is "two hundred thirty-three million, five hundred thirty-two thousand, four hundred twenty-one".