231311151 has 12 divisors (see below), whose sum is σ = 336521640. Its totient is φ = 153097200.

The previous prime is 231311107. The next prime is 231311153. The reversal of 231311151 is 151113132.

It is a de Polignac number, because none of the positive numbers 2^k-231311151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231311153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91200 + ... + 93701.

It is an arithmetic number, because the mean of its divisors is an integer number (28043470).

Almost surely, 2^231311151 is an apocalyptic number.

231311151 is a deficient number, since it is larger than the sum of its proper divisors (105210489).

231311151 is a wasteful number, since it uses less digits than its factorization.

231311151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185046 (or 185043 counting only the distinct ones).

The product of its digits is 90, while the sum is 18.

The square root of 231311151 is about 15208.9168253364. The cubic root of 231311151 is about 613.8546121334.

Adding to 231311151 its reverse (151113132), we get a palindrome (382424283).

The spelling of 231311151 in words is "two hundred thirty-one million, three hundred eleven thousand, one hundred fifty-one".