25071513 has 4 divisors (see below), whose sum is σ = 33428688. Its totient is φ = 16714340.

The previous prime is 25071503. The next prime is 25071517. The reversal of 25071513 is 31517052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25071513 - 2¹⁰ = 25070489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25071517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4178583 + ... + 4178588.

It is an arithmetic number, because the mean of its divisors is an integer number (8357172).

Almost surely, 2^25071513 is an apocalyptic number.

It is an amenable number.

25071513 is a deficient number, since it is larger than the sum of its proper divisors (8357175).

25071513 is an equidigital number, since it uses as much as digits as its factorization.

25071513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8357174.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 25071513 is about 5007.1461931923. The cubic root of 25071513 is about 292.6803154393.

Adding to 25071513 its reverse (31517052), we get a palindrome (56588565).

The spelling of 25071513 in words is "twenty-five million, seventy-one thousand, five hundred thirteen".