231341551 has 4 divisors (see below), whose sum is σ = 264390352. Its totient is φ = 198292752.

The previous prime is 231341543. The next prime is 231341603. The reversal of 231341551 is 155143132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 231341551 - 2³ = 231341543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231341531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16524390 + ... + 16524403.

It is an arithmetic number, because the mean of its divisors is an integer number (66097588).

Almost surely, 2^231341551 is an apocalyptic number.

231341551 is a deficient number, since it is larger than the sum of its proper divisors (33048801).

231341551 is an equidigital number, since it uses as much as digits as its factorization.

231341551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33048800.

The product of its digits is 1800, while the sum is 25.

The square root of 231341551 is about 15209.9162062123. The cubic root of 231341551 is about 613.8815028427.

Adding to 231341551 its reverse (155143132), we get a palindrome (386484683).

The spelling of 231341551 in words is "two hundred thirty-one million, three hundred forty-one thousand, five hundred fifty-one".