131772551 has 2 divisors, whose sum is σ = 131772552. Its totient is φ = 131772550.

The previous prime is 131772527. The next prime is 131772569. The reversal of 131772551 is 155277131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131772551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131771551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65886275 + 65886276.

It is an arithmetic number, because the mean of its divisors is an integer number (65886276).

Almost surely, 2^131772551 is an apocalyptic number.

131772551 is a deficient number, since it is larger than the sum of its proper divisors (1).

131772551 is an equidigital number, since it uses as much as digits as its factorization.

131772551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7350, while the sum is 32.

The square root of 131772551 is about 11479.2225782062. Note that the first 3 decimals coincide. The cubic root of 131772551 is about 508.8717220676.

The spelling of 131772551 in words is "one hundred thirty-one million, seven hundred seventy-two thousand, five hundred fifty-one".