825137244 has 36 divisors (see below), whose sum is σ = 2195542440. Its totient is φ = 260569440.

The previous prime is 825137239. The next prime is 825137251. The reversal of 825137244 is 442731528.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 825137199 and 825137208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 602487 + ... + 603854.

It is an arithmetic number, because the mean of its divisors is an integer number (60987290).

Almost surely, 2^825137244 is an apocalyptic number.

It is an amenable number.

825137244 is an abundant number, since it is smaller than the sum of its proper divisors (1370405196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

825137244 is a wasteful number, since it uses less digits than its factorization.

825137244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206370 (or 1206365 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 825137244 is about 28725.2022447188. The cubic root of 825137244 is about 937.9407327192.

The spelling of 825137244 in words is "eight hundred twenty-five million, one hundred thirty-seven thousand, two hundred forty-four".