25511013 has 12 divisors (see below), whose sum is σ = 40199328. Its totient is φ = 15461160.

The previous prime is 25511011. The next prime is 25511021. The reversal of 25511013 is 31011552.

It is not a de Polignac number, because 25511013 - 2¹ = 25511011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25511011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128745 + ... + 128942.

It is an arithmetic number, because the mean of its divisors is an integer number (3349944).

Almost surely, 2^25511013 is an apocalyptic number.

It is an amenable number.

25511013 is a deficient number, since it is larger than the sum of its proper divisors (14688315).

25511013 is a wasteful number, since it uses less digits than its factorization.

25511013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257704 (or 257701 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 25511013 is about 5050.8428009591. The cubic root of 25511013 is about 294.3806329132.

Adding to 25511013 its reverse (31011552), we get a palindrome (56522565).

The spelling of 25511013 in words is "twenty-five million, five hundred eleven thousand, thirteen".