331340231 has 4 divisors (see below), whose sum is σ = 345746352. Its totient is φ = 316934112.

The previous prime is 331340201. The next prime is 331340249. The reversal of 331340231 is 132043133.

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

It is not a de Polignac number, because 331340231 - 2¹⁴ = 331323847 is a prime.

It is a super-2 number, since 2×331340231² = 219572697358266722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331340201) 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, 7203026 + ... + 7203071.

It is an arithmetic number, because the mean of its divisors is an integer number (86436588).

Almost surely, 2^331340231 is an apocalyptic number.

331340231 is a deficient number, since it is larger than the sum of its proper divisors (14406121).

331340231 is a wasteful number, since it uses less digits than its factorization.

331340231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14406120.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 331340231 is about 18202.7533906275. The cubic root of 331340231 is about 691.9765708430.

Adding to 331340231 its reverse (132043133), we get a palindrome (463383364).

The spelling of 331340231 in words is "three hundred thirty-one million, three hundred forty thousand, two hundred thirty-one".