825113251 has 4 divisors (see below), whose sum is σ = 825181632. Its totient is φ = 825044872.

The previous prime is 825113243. The next prime is 825113299. The reversal of 825113251 is 152311528.

825113251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 825113251 - 2³ = 825113243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (825113651) 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, 10720 + ... + 42013.

It is an arithmetic number, because the mean of its divisors is an integer number (206295408).

Almost surely, 2^825113251 is an apocalyptic number.

825113251 is a deficient number, since it is larger than the sum of its proper divisors (68381).

825113251 is a wasteful number, since it uses less digits than its factorization.

825113251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68380.

The product of its digits is 2400, while the sum is 28.

The square root of 825113251 is about 28724.7846118992. The cubic root of 825113251 is about 937.9316416133.

Adding to 825113251 its reverse (152311528), we get a palindrome (977424779).

The spelling of 825113251 in words is "eight hundred twenty-five million, one hundred thirteen thousand, two hundred fifty-one".