131315554 has 16 divisors (see below), whose sum is σ = 202203576. Its totient is φ = 63936000.

The previous prime is 131315551. The next prime is 131315563. The reversal of 131315554 is 455513131.

It can be written as a sum of positive squares in 4 ways, for example, as 79691329 + 51624225 = 8927^2 + 7185^2 .

It is not an unprimeable number, because it can be changed into a prime (131315551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6994 + ... + 17650.

Almost surely, 2^131315554 is an apocalyptic number.

131315554 is a deficient number, since it is larger than the sum of its proper divisors (70888022).

131315554 is a wasteful number, since it uses less digits than its factorization.

131315554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10821.

The product of its digits is 4500, while the sum is 28.

The square root of 131315554 is about 11459.2998913546. The cubic root of 131315554 is about 508.2827723846.

Adding to 131315554 its reverse (455513131), we get a palindrome (586828685).

It can be divided in two parts, 1313 and 15554, that multiplied together give a palindrome (20422402).

The spelling of 131315554 in words is "one hundred thirty-one million, three hundred fifteen thousand, five hundred fifty-four".