131316551 has 8 divisors (see below), whose sum is σ = 140318640. Its totient is φ = 122456448.

The previous prime is 131316547. The next prime is 131316557. The reversal of 131316551 is 155613131.

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 131316551 - 2² = 131316547 is a prime.

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 131316551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131316557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33581 + ... + 37286.

It is an arithmetic number, because the mean of its divisors is an integer number (17539830).

Almost surely, 2^131316551 is an apocalyptic number.

131316551 is a deficient number, since it is larger than the sum of its proper divisors (9002089).

131316551 is a wasteful number, since it uses less digits than its factorization.

131316551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70993.

The product of its digits is 1350, while the sum is 26.

The square root of 131316551 is about 11459.3433930570. The cubic root of 131316551 is about 508.2840587432.

Adding to 131316551 its reverse (155613131), we get a palindrome (286929682).

The spelling of 131316551 in words is "one hundred thirty-one million, three hundred sixteen thousand, five hundred fifty-one".