231070429 has 2 divisors, whose sum is σ = 231070430. Its totient is φ = 231070428.

The previous prime is 231070321. The next prime is 231070451. The reversal of 231070429 is 924070132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171007929 + 60062500 = 13077^2 + 7750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231070429 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 231070397 and 231070406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231070529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115535214 + 115535215.

It is an arithmetic number, because the mean of its divisors is an integer number (115535215).

Almost surely, 2^231070429 is an apocalyptic number.

It is an amenable number.

231070429 is a deficient number, since it is larger than the sum of its proper divisors (1).

231070429 is an equidigital number, since it uses as much as digits as its factorization.

231070429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 231070429 is about 15201.0009209920. Note that the first 3 decimals coincide. The cubic root of 231070429 is about 613.6415951661.

Subtracting from 231070429 its sum of digits (28), we obtain a square (231070401 = 15201²).

The spelling of 231070429 in words is "two hundred thirty-one million, seventy thousand, four hundred twenty-nine".