16250981 has 2 divisors, whose sum is σ = 16250982. Its totient is φ = 16250980.

The previous prime is 16250957. The next prime is 16251007. The reversal of 16250981 is 18905261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13205956 + 3045025 = 3634^2 + 1745^2 .

It is a cyclic number.

It is not a de Polignac number, because 16250981 - 2¹⁸ = 15988837 is a prime.

It is a super-2 number, since 2×16250981² = 528188766924722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16250911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8125490 + 8125491.

It is an arithmetic number, because the mean of its divisors is an integer number (8125491).

Almost surely, 2^16250981 is an apocalyptic number.

It is an amenable number.

16250981 is a deficient number, since it is larger than the sum of its proper divisors (1).

16250981 is an equidigital number, since it uses as much as digits as its factorization.

16250981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 16250981 is about 4031.2505503876. The cubic root of 16250981 is about 253.2949478236.

The spelling of 16250981 in words is "sixteen million, two hundred fifty thousand, nine hundred eighty-one".