131624261 has 2 divisors, whose sum is σ = 131624262. Its totient is φ = 131624260.

The previous prime is 131624203. The next prime is 131624279. The reversal of 131624261 is 162426131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107516161 + 24108100 = 10369^2 + 4910^2 .

It is a cyclic number.

It is not a de Polignac number, because 131624261 - 2¹⁴ = 131607877 is a prime.

It is a super-2 number, since 2×131624261² = 34649892167592242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131624261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131624201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65812130 + 65812131.

It is an arithmetic number, because the mean of its divisors is an integer number (65812131).

Almost surely, 2^131624261 is an apocalyptic number.

It is an amenable number.

131624261 is a deficient number, since it is larger than the sum of its proper divisors (1).

131624261 is an equidigital number, since it uses as much as digits as its factorization.

131624261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 26.

The square root of 131624261 is about 11472.7616989110. The cubic root of 131624261 is about 508.6807644635.

The spelling of 131624261 in words is "one hundred thirty-one million, six hundred twenty-four thousand, two hundred sixty-one".