231342551 has 8 divisors (see below), whose sum is σ = 252633600. Its totient is φ = 210094840.

The previous prime is 231342539. The next prime is 231342557. The reversal of 231342551 is 155243132.

It is a happy number.

231342551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231342551 - 2¹⁴ = 231326167 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231342551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231342557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 890 + ... + 21528.

It is an arithmetic number, because the mean of its divisors is an integer number (31579200).

Almost surely, 2^231342551 is an apocalyptic number.

231342551 is a deficient number, since it is larger than the sum of its proper divisors (21291049).

231342551 is a wasteful number, since it uses less digits than its factorization.

231342551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21669.

The product of its digits is 3600, while the sum is 26.

The square root of 231342551 is about 15209.9490794677. The cubic root of 231342551 is about 613.8823873655.

Adding to 231342551 its reverse (155243132), we get a palindrome (386585683).

The spelling of 231342551 in words is "two hundred thirty-one million, three hundred forty-two thousand, five hundred fifty-one".