25513497 has 6 divisors (see below), whose sum is σ = 36852842. Its totient is φ = 17008992.

The previous prime is 25513483. The next prime is 25513513. The reversal of 25513497 is 79431552.

It can be written as a sum of positive squares in only one way, i.e., 23707161 + 1806336 = 4869^2 + 1344^2 .

It is not a de Polignac number, because 25513497 - 2¹¹ = 25511449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25513457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1417408 + ... + 1417425.

Almost surely, 2^25513497 is an apocalyptic number.

It is an amenable number.

25513497 is a deficient number, since it is larger than the sum of its proper divisors (11339345).

25513497 is a wasteful number, since it uses less digits than its factorization.

25513497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2834839 (or 2834836 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 25513497 is about 5051.0886945291. The cubic root of 25513497 is about 294.3901871889.

The spelling of 25513497 in words is "twenty-five million, five hundred thirteen thousand, four hundred ninety-seven".