28425251522 has 4 divisors (see below), whose sum is σ = 42637877286. Its totient is φ = 14212625760.

The previous prime is 28425251521. The next prime is 28425251623. The reversal of 28425251522 is 22515252482.

It is a happy number.

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., 26169856441 + 2255395081 = 161771^2 + 47491^2 .

It is not an unprimeable number, because it can be changed into a prime (28425251521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7106312879 + ... + 7106312882.

Almost surely, 2^28425251522 is an apocalyptic number.

28425251522 is a deficient number, since it is larger than the sum of its proper divisors (14212625764).

28425251522 is a wasteful number, since it uses less digits than its factorization.

28425251522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14212625763.

The product of its digits is 128000, while the sum is 38.

The spelling of 28425251522 in words is "twenty-eight billion, four hundred twenty-five million, two hundred fifty-one thousand, five hundred twenty-two".