131223545 has 8 divisors (see below), whose sum is σ = 158997696. Its totient is φ = 103959216.

The previous prime is 131223539. The next prime is 131223551. The reversal of 131223545 is 545322131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (131223539) and next prime (131223551).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131223545 - 2¹⁴ = 131207161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126887 + ... + 127916.

It is an arithmetic number, because the mean of its divisors is an integer number (19874712).

Almost surely, 2^131223545 is an apocalyptic number.

It is an amenable number.

131223545 is a deficient number, since it is larger than the sum of its proper divisors (27774151).

131223545 is a wasteful number, since it uses less digits than its factorization.

131223545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254911.

The product of its digits is 3600, while the sum is 26.

The square root of 131223545 is about 11455.2845883461. The cubic root of 131223545 is about 508.1640316488.

Adding to 131223545 its reverse (545322131), we get a palindrome (676545676).

The spelling of 131223545 in words is "one hundred thirty-one million, two hundred twenty-three thousand, five hundred forty-five".