25216001 has 2 divisors, whose sum is σ = 25216002. Its totient is φ = 25216000.

The previous prime is 25215991. The next prime is 25216019. The reversal of 25216001 is 10061252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24245776 + 970225 = 4924^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 25216001 - 2¹⁴ = 25199617 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25216031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12608000 + 12608001.

It is an arithmetic number, because the mean of its divisors is an integer number (12608001).

Almost surely, 2^25216001 is an apocalyptic number.

It is an amenable number.

25216001 is a deficient number, since it is larger than the sum of its proper divisors (1).

25216001 is an equidigital number, since it uses as much as digits as its factorization.

25216001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 25216001 is about 5021.5536440428. The cubic root of 25216001 is about 293.2414810838.

Adding to 25216001 its reverse (10061252), we get a palindrome (35277253).

The spelling of 25216001 in words is "twenty-five million, two hundred sixteen thousand, one".