52557642 has 24 divisors (see below), whose sum is σ = 120574116. Its totient is φ = 16488576.

The previous prime is 52557641. The next prime is 52557671. The reversal of 52557642 is 24675525.

52557642 is a `hidden beast` number, since 5 + 2 + 5 + 5 + 7 + 642 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 40717161 + 11840481 = 6381^2 + 3441^2 .

It is a junction number, because it is equal to n+sod(n) for n = 52557597 and 52557606.

It is not an unprimeable number, because it can be changed into a prime (52557641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85573 + ... + 86184.

Almost surely, 2^52557642 is an apocalyptic number.

52557642 is an abundant number, since it is smaller than the sum of its proper divisors (68016474).

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

52557642 is a wasteful number, since it uses less digits than its factorization.

52557642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171782 (or 171779 counting only the distinct ones).

The product of its digits is 84000, while the sum is 36.

The square root of 52557642 is about 7249.6649577756. The cubic root of 52557642 is about 374.5806084702.

The spelling of 52557642 in words is "fifty-two million, five hundred fifty-seven thousand, six hundred forty-two".