123131331 has 6 divisors (see below), whose sum is σ = 177856380. Its totient is φ = 82087548.

The previous prime is 123131329. The next prime is 123131339. The reversal of 123131331 is 133131321.

It is a happy number.

It is not a de Polignac number, because 123131331 - 2¹ = 123131329 is a prime.

It is a super-2 number, since 2×123131331² = 30322649347663122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123131339) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6840621 + ... + 6840638.

It is an arithmetic number, because the mean of its divisors is an integer number (29642730).

Almost surely, 2^123131331 is an apocalyptic number.

123131331 is a deficient number, since it is larger than the sum of its proper divisors (54725049).

123131331 is a wasteful number, since it uses less digits than its factorization.

123131331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13681265 (or 13681262 counting only the distinct ones).

The product of its digits is 162, while the sum is 18.

The square root of 123131331 is about 11096.4557855200. The cubic root of 123131331 is about 497.4959214500.

Adding to 123131331 its reverse (133131321), we get a palindrome (256262652).

The spelling of 123131331 in words is "one hundred twenty-three million, one hundred thirty-one thousand, three hundred thirty-one".