25155513 has 12 divisors (see below), whose sum is σ = 36848448. Its totient is φ = 16533720.

The previous prime is 25155511. The next prime is 25155517. The reversal of 25155513 is 31555152.

It is not a de Polignac number, because 25155513 - 2¹ = 25155511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25155511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19045 + ... + 20322.

It is an arithmetic number, because the mean of its divisors is an integer number (3070704).

Almost surely, 2^25155513 is an apocalyptic number.

It is an amenable number.

25155513 is a deficient number, since it is larger than the sum of its proper divisors (11692935).

25155513 is a wasteful number, since it uses less digits than its factorization.

25155513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39444 (or 39441 counting only the distinct ones).

The product of its digits is 3750, while the sum is 27.

The square root of 25155513 is about 5015.5271906351. The cubic root of 25155513 is about 293.0068180143.

It can be divided in two parts, 2 and 5155513, that added together give a palindrome (5155515).

The spelling of 25155513 in words is "twenty-five million, one hundred fifty-five thousand, five hundred thirteen".