131810551 has 2 divisors, whose sum is σ = 131810552. Its totient is φ = 131810550.

The previous prime is 131810521. The next prime is 131810573. The reversal of 131810551 is 155018131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131810551 - 2¹⁷ = 131679479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131810521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65905275 + 65905276.

It is an arithmetic number, because the mean of its divisors is an integer number (65905276).

Almost surely, 2^131810551 is an apocalyptic number.

131810551 is a deficient number, since it is larger than the sum of its proper divisors (1).

131810551 is an equidigital number, since it uses as much as digits as its factorization.

131810551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 25.

The square root of 131810551 is about 11480.8776232481. The cubic root of 131810551 is about 508.9206327773.

Adding to 131810551 its reverse (155018131), we get a palindrome (286828682).

The spelling of 131810551 in words is "one hundred thirty-one million, eight hundred ten thousand, five hundred fifty-one".