25251013 has 2 divisors, whose sum is σ = 25251014. Its totient is φ = 25251012.

The previous prime is 25250999. The next prime is 25251047. The reversal of 25251013 is 31015252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18809569 + 6441444 = 4337^2 + 2538^2 .

It is a cyclic number.

It is not a de Polignac number, because 25251013 - 2⁹ = 25250501 is a prime.

It is a super-2 number, since 2×25251013² = 1275227315052338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25251053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12625506 + 12625507.

It is an arithmetic number, because the mean of its divisors is an integer number (12625507).

Almost surely, 2^25251013 is an apocalyptic number.

It is an amenable number.

25251013 is a deficient number, since it is larger than the sum of its proper divisors (1).

25251013 is an equidigital number, since it uses as much as digits as its factorization.

25251013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 25251013 is about 5025.0386068169. The cubic root of 25251013 is about 293.3771386313.

Adding to 25251013 its reverse (31015252), we get a palindrome (56266265).

The spelling of 25251013 in words is "twenty-five million, two hundred fifty-one thousand, thirteen".