25151513 has 2 divisors, whose sum is σ = 25151514. Its totient is φ = 25151512.

The previous prime is 25151473. The next prime is 25151519. The reversal of 25151513 is 31515152.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15745024 + 9406489 = 3968^2 + 3067^2 .

It is a cyclic number.

It is not a de Polignac number, because 25151513 - 2⁸ = 25151257 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25151519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12575756 + 12575757.

It is an arithmetic number, because the mean of its divisors is an integer number (12575757).

Almost surely, 2^25151513 is an apocalyptic number.

It is an amenable number.

25151513 is a deficient number, since it is larger than the sum of its proper divisors (1).

25151513 is an equidigital number, since it uses as much as digits as its factorization.

25151513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 750, while the sum is 23.

The square root of 25151513 is about 5015.1284131117. The cubic root of 25151513 is about 292.9912867681.

Adding to 25151513 its reverse (31515152), we get a palindrome (56666665).

It can be divided in two parts, 2 and 5151513, that added together give a palindrome (5151515).

The spelling of 25151513 in words is "twenty-five million, one hundred fifty-one thousand, five hundred thirteen".