52545649 has 8 divisors (see below), whose sum is σ = 56924840. Its totient is φ = 48501648.

The previous prime is 52545643. The next prime is 52545673. The reversal of 52545649 is 94654525.

52545649 = T₃₈₀ + T₃₈₁ + ... + T₇₁₇.

It can be written as a sum of positive squares in 4 ways, for example, as 13395600 + 39150049 = 3660^2 + 6257^2 .

It is not a de Polignac number, because 52545649 - 2⁵ = 52545617 is a prime.

It is a super-2 number, since 2×52545649² = 5522090457662402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52545643) 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 7 ways as a sum of consecutive naturals, for example, 9762 + ... + 14155.

It is an arithmetic number, because the mean of its divisors is an integer number (7115605).

Almost surely, 2^52545649 is an apocalyptic number.

It is an amenable number.

52545649 is a deficient number, since it is larger than the sum of its proper divisors (4379191).

52545649 is an equidigital number, since it uses as much as digits as its factorization.

52545649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23956 (or 23930 counting only the distinct ones).

The product of its digits is 216000, while the sum is 40.

The square root of 52545649 is about 7248.8377689116. The cubic root of 52545649 is about 374.5521147579.

The spelling of 52545649 in words is "fifty-two million, five hundred forty-five thousand, six hundred forty-nine".