123523151 has 4 divisors (see below), whose sum is σ = 127782600. Its totient is φ = 119263704.

The previous prime is 123523129. The next prime is 123523163. The reversal of 123523151 is 151325321.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123523151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123523181) 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, 2129681 + ... + 2129738.

It is an arithmetic number, because the mean of its divisors is an integer number (31945650).

Almost surely, 2^123523151 is an apocalyptic number.

123523151 is a deficient number, since it is larger than the sum of its proper divisors (4259449).

123523151 is an equidigital number, since it uses as much as digits as its factorization.

123523151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4259448.

The product of its digits is 900, while the sum is 23.

The square root of 123523151 is about 11114.0969493702. The cubic root of 123523151 is about 498.0230617321.

Adding to 123523151 its reverse (151325321), we get a palindrome (274848472).

The spelling of 123523151 in words is "one hundred twenty-three million, five hundred twenty-three thousand, one hundred fifty-one".