47109825 has 54 divisors (see below), whose sum is σ = 98178054. Its totient is φ = 21530880.

The previous prime is 47109823. The next prime is 47109841. The reversal of 47109825 is 52890174.

It can be written as a sum of positive squares in 3 ways, for example, as 815409 + 46294416 = 903^2 + 6804^2 .

It is not a de Polignac number, because 47109825 - 2¹ = 47109823 is a prime.

It is a super-2 number, since 2×47109825² = 4438671223061250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 47109825.

It is not an unprimeable number, because it can be changed into a prime (47109823) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 8889 + ... + 13161.

Almost surely, 2^47109825 is an apocalyptic number.

47109825 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

47109825 is an abundant number, since it is smaller than the sum of its proper divisors (51068229).

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

47109825 is a wasteful number, since it uses less digits than its factorization.

47109825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4303 (or 4288 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 47109825 is about 6863.6597380698. The cubic root of 47109825 is about 361.1634810744.

Adding to 47109825 its reverse (52890174), we get a palindrome (99999999).

It can be divided in two parts, 4710 and 9825, that added together give a triangular number (14535 = T₁₇₀).

The spelling of 47109825 in words is "forty-seven million, one hundred nine thousand, eight hundred twenty-five".