52215442 has 4 divisors (see below), whose sum is σ = 78323166. Its totient is φ = 26107720.

The previous prime is 52215437. The next prime is 52215479. The reversal of 52215442 is 24451225.

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., 41332041 + 10883401 = 6429^2 + 3299^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13053859 + ... + 13053862.

Almost surely, 2^52215442 is an apocalyptic number.

52215442 is a deficient number, since it is larger than the sum of its proper divisors (26107724).

52215442 is a wasteful number, since it uses less digits than its factorization.

52215442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26107723.

The product of its digits is 3200, while the sum is 25.

The square root of 52215442 is about 7226.0253251701. The cubic root of 52215442 is about 373.7658795727.

Adding to 52215442 its reverse (24451225), we get a palindrome (76666667).

The spelling of 52215442 in words is "fifty-two million, two hundred fifteen thousand, four hundred forty-two".