231613453 has 2 divisors, whose sum is σ = 231613454. Its totient is φ = 231613452.

The previous prime is 231613441. The next prime is 231613463. The reversal of 231613453 is 354316132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231435369 + 178084 = 15213^2 + 422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231613453 is a prime.

It is a super-2 number, since 2×231613453² = 107289583221166418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231613463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115806726 + 115806727.

It is an arithmetic number, because the mean of its divisors is an integer number (115806727).

Almost surely, 2^231613453 is an apocalyptic number.

It is an amenable number.

231613453 is a deficient number, since it is larger than the sum of its proper divisors (1).

231613453 is an equidigital number, since it uses as much as digits as its factorization.

231613453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 28.

The square root of 231613453 is about 15218.8518949361. The cubic root of 231613453 is about 614.1219125412.

Adding to 231613453 its reverse (354316132), we get a palindrome (585929585).

The spelling of 231613453 in words is "two hundred thirty-one million, six hundred thirteen thousand, four hundred fifty-three".