52155442 has 4 divisors (see below), whose sum is σ = 78233166. Its totient is φ = 26077720.

The previous prime is 52155407. The next prime is 52155449. The reversal of 52155442 is 24455125.

52155442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 51969681 + 185761 = 7209^2 + 431^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 52155442.

It is not an unprimeable number, because it can be changed into a prime (52155449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13038859 + ... + 13038862.

Almost surely, 2^52155442 is an apocalyptic number.

52155442 is a deficient number, since it is larger than the sum of its proper divisors (26077724).

52155442 is a wasteful number, since it uses less digits than its factorization.

52155442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26077723.

The product of its digits is 8000, while the sum is 28.

The square root of 52155442 is about 7221.8724718732. The cubic root of 52155442 is about 373.6226617354.

The spelling of 52155442 in words is "fifty-two million, one hundred fifty-five thousand, four hundred forty-two".