131225651 has 2 divisors, whose sum is σ = 131225652. Its totient is φ = 131225650.

The previous prime is 131225639. The next prime is 131225693. The reversal of 131225651 is 156522131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131225651 - 2¹⁰ = 131224627 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131225651.

It is not a weakly prime, because it can be changed into another prime (131225251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65612825 + 65612826.

It is an arithmetic number, because the mean of its divisors is an integer number (65612826).

Almost surely, 2^131225651 is an apocalyptic number.

131225651 is a deficient number, since it is larger than the sum of its proper divisors (1).

131225651 is an equidigital number, since it uses as much as digits as its factorization.

131225651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 26.

The square root of 131225651 is about 11455.3765106172. The cubic root of 131225651 is about 508.1667501338.

Adding to 131225651 its reverse (156522131), we get a palindrome (287747782).

The spelling of 131225651 in words is "one hundred thirty-one million, two hundred twenty-five thousand, six hundred fifty-one".