825585501 has 16 divisors (see below), whose sum is σ = 1255189824. Its totient is φ = 478166784.

The previous prime is 825585499. The next prime is 825585539. The reversal of 825585501 is 105585528.

It is not a de Polignac number, because 825585501 - 2¹ = 825585499 is a prime.

It is a super-2 number, since 2×825585501² = 1363182838922842002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 825585501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825585301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 621951 + ... + 623276.

It is an arithmetic number, because the mean of its divisors is an integer number (78449364).

Almost surely, 2^825585501 is an apocalyptic number.

It is an amenable number.

825585501 is a deficient number, since it is larger than the sum of its proper divisors (429604323).

825585501 is a wasteful number, since it uses less digits than its factorization.

825585501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245260.

The product of its (nonzero) digits is 80000, while the sum is 39.

The square root of 825585501 is about 28733.0036891377. The cubic root of 825585501 is about 938.1105478582.

The spelling of 825585501 in words is "eight hundred twenty-five million, five hundred eighty-five thousand, five hundred one".