123131351 has 16 divisors (see below), whose sum is σ = 147184128. Its totient is φ = 100716000.

The previous prime is 123131347. The next prime is 123131369. The reversal of 123131351 is 153131321.

It is not a de Polignac number, because 123131351 - 2² = 123131347 is a prime.

It is a super-2 number, since 2×123131351² = 30322659198170402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123131251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112316 + ... + 113406.

It is an arithmetic number, because the mean of its divisors is an integer number (9199008).

Almost surely, 2^123131351 is an apocalyptic number.

123131351 is a deficient number, since it is larger than the sum of its proper divisors (24052777).

123131351 is a wasteful number, since it uses less digits than its factorization.

123131351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822.

The product of its digits is 270, while the sum is 20.

The square root of 123131351 is about 11096.4566867086. The cubic root of 123131351 is about 497.4959483858.

Adding to 123131351 its reverse (153131321), we get a palindrome (276262672).

The spelling of 123131351 in words is "one hundred twenty-three million, one hundred thirty-one thousand, three hundred fifty-one".