131273045 has 4 divisors (see below), whose sum is σ = 157527660. Its totient is φ = 105018432.

The previous prime is 131273041. The next prime is 131273047. The reversal of 131273045 is 540372131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 55965361 + 75307684 = 7481^2 + 8678^2 .

It is a cyclic number.

It is not a de Polignac number, because 131273045 - 2² = 131273041 is a prime.

It is a super-2 number, since 2×131273045² = 34465224687144050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131273041) 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, 13127300 + ... + 13127309.

It is an arithmetic number, because the mean of its divisors is an integer number (39381915).

Almost surely, 2^131273045 is an apocalyptic number.

It is an amenable number.

131273045 is a deficient number, since it is larger than the sum of its proper divisors (26254615).

131273045 is an equidigital number, since it uses as much as digits as its factorization.

131273045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26254614.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 131273045 is about 11457.4449595012. Note that the first 3 decimals coincide. The cubic root of 131273045 is about 508.2279199735.

The spelling of 131273045 in words is "one hundred thirty-one million, two hundred seventy-three thousand, forty-five".