231103421 has 2 divisors, whose sum is σ = 231103422. Its totient is φ = 231103420.

The previous prime is 231103399. The next prime is 231103427. The reversal of 231103421 is 124301132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153487321 + 77616100 = 12389^2 + 8810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231103421 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231103421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231103427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115551710 + 115551711.

It is an arithmetic number, because the mean of its divisors is an integer number (115551711).

Almost surely, 2^231103421 is an apocalyptic number.

It is an amenable number.

231103421 is a deficient number, since it is larger than the sum of its proper divisors (1).

231103421 is an equidigital number, since it uses as much as digits as its factorization.

231103421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 231103421 is about 15202.0860739571. The cubic root of 231103421 is about 613.6707988165.

Adding to 231103421 its reverse (124301132), we get a palindrome (355404553).

The spelling of 231103421 in words is "two hundred thirty-one million, one hundred three thousand, four hundred twenty-one".