131400545 has 8 divisors (see below), whose sum is σ = 157755624. Its totient is φ = 105070464.

The previous prime is 131400517. The next prime is 131400553. The reversal of 131400545 is 545004131.

It can be written as a sum of positive squares in 4 ways, for example, as 15429184 + 115971361 = 3928^2 + 10769^2 .

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 131400545 - 2²² = 127206241 is a prime.

It is a super-2 number, since 2×131400545² = 34532206452594050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131400545.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8477 + ... + 18293.

It is an arithmetic number, because the mean of its divisors is an integer number (19719453).

Almost surely, 2^131400545 is an apocalyptic number.

It is an amenable number.

131400545 is a deficient number, since it is larger than the sum of its proper divisors (26355079).

131400545 is an equidigital number, since it uses as much as digits as its factorization.

131400545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12499.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 131400545 is about 11463.0076768708. The cubic root of 131400545 is about 508.3924068826.

Adding to 131400545 its reverse (545004131), we get a palindrome (676404676).

The spelling of 131400545 in words is "one hundred thirty-one million, four hundred thousand, five hundred forty-five".