231010421 has 2 divisors, whose sum is σ = 231010422. Its totient is φ = 231010420.

The previous prime is 231010393. The next prime is 231010487. The reversal of 231010421 is 124010132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 226954225 + 4056196 = 15065^2 + 2014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231010421 is a prime.

It is a super-2 number, since 2×231010421² = 106731629221194482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231010396 and 231010405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231090421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115505210 + 115505211.

It is an arithmetic number, because the mean of its divisors is an integer number (115505211).

Almost surely, 2^231010421 is an apocalyptic number.

It is an amenable number.

231010421 is a deficient number, since it is larger than the sum of its proper divisors (1).

231010421 is an equidigital number, since it uses as much as digits as its factorization.

231010421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 231010421 is about 15199.0269754350. The cubic root of 231010421 is about 613.5884705364.

Adding to 231010421 its reverse (124010132), we get a palindrome (355020553).

The spelling of 231010421 in words is "two hundred thirty-one million, ten thousand, four hundred twenty-one".