52545442 has 4 divisors (see below), whose sum is σ = 78818166. Its totient is φ = 26272720.

The previous prime is 52545421. The next prime is 52545491. The reversal of 52545442 is 24454525.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 46498761 + 6046681 = 6819^2 + 2459^2 .

It is a super-2 number, since 2×52545442² = 5522046949950728, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13136359 + ... + 13136362.

Almost surely, 2^52545442 is an apocalyptic number.

52545442 is a deficient number, since it is larger than the sum of its proper divisors (26272724).

52545442 is a wasteful number, since it uses less digits than its factorization.

52545442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26272723.

The product of its digits is 32000, while the sum is 31.

The square root of 52545442 is about 7248.8234907466. The cubic root of 52545442 is about 374.5516229165.

Adding to 52545442 its reverse (24454525), we get a palindrome (76999967).

The spelling of 52545442 in words is "fifty-two million, five hundred forty-five thousand, four hundred forty-two".