25311001 has 2 divisors, whose sum is σ = 25311002. Its totient is φ = 25311000.

The previous prime is 25310993. The next prime is 25311031. The reversal of 25311001 is 10011352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24206400 + 1104601 = 4920^2 + 1051^2 .

It is a cyclic number.

It is not a de Polignac number, because 25311001 - 2³ = 25310993 is a prime.

It is not a weakly prime, because it can be changed into another prime (25311031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12655500 + 12655501.

It is an arithmetic number, because the mean of its divisors is an integer number (12655501).

Almost surely, 2^25311001 is an apocalyptic number.

It is an amenable number.

25311001 is a deficient number, since it is larger than the sum of its proper divisors (1).

25311001 is an equidigital number, since it uses as much as digits as its factorization.

25311001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 25311001 is about 5031.0039753512. The cubic root of 25311001 is about 293.6092770359.

Adding to 25311001 its reverse (10011352), we get a palindrome (35322353).

The spelling of 25311001 in words is "twenty-five million, three hundred eleven thousand, one".