131005450551 has 4 divisors (see below), whose sum is σ = 174673934072. Its totient is φ = 87336967032.

The previous prime is 131005450489. The next prime is 131005450559. The reversal of 131005450551 is 155054500131.

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

It is not a de Polignac number, because 131005450551 - 2¹¹ = 131005448503 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 (131005450559) 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, 21834241756 + ... + 21834241761.

It is an arithmetic number, because the mean of its divisors is an integer number (43668483518).

Almost surely, 2^131005450551 is an apocalyptic number.

131005450551 is a deficient number, since it is larger than the sum of its proper divisors (43668483521).

131005450551 is an equidigital number, since it uses as much as digits as its factorization.

131005450551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43668483520.

The product of its (nonzero) digits is 7500, while the sum is 30.

Adding to 131005450551 its reverse (155054500131), we get a palindrome (286059950682).

The spelling of 131005450551 in words is "one hundred thirty-one billion, five million, four hundred fifty thousand, five hundred fifty-one".