234131621 has 2 divisors, whose sum is σ = 234131622. Its totient is φ = 234131620.

The previous prime is 234131609. The next prime is 234131683. The reversal of 234131621 is 126131432.

234131621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207763396 + 26368225 = 14414^2 + 5135^2 .

It is a cyclic number.

It is not a de Polignac number, because 234131621 - 2¹⁴ = 234115237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234131921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117065810 + 117065811.

It is an arithmetic number, because the mean of its divisors is an integer number (117065811).

Almost surely, 2^234131621 is an apocalyptic number.

It is an amenable number.

234131621 is a deficient number, since it is larger than the sum of its proper divisors (1).

234131621 is an equidigital number, since it uses as much as digits as its factorization.

234131621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 234131621 is about 15301.3601029451. The cubic root of 234131621 is about 616.3395316104.

The spelling of 234131621 in words is "two hundred thirty-four million, one hundred thirty-one thousand, six hundred twenty-one".