228521285522 has 4 divisors (see below), whose sum is σ = 342781928286. Its totient is φ = 114260642760.

The previous prime is 228521285519. The next prime is 228521285561. The reversal of 228521285522 is 225582125822.

It is a Cunningham number, because it is equal to 478039²+1.

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., 228521285521 + 1 = 478039^2 + 1^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57130321379 + ... + 57130321382.

Almost surely, 2^228521285522 is an apocalyptic number.

228521285522 is a deficient number, since it is larger than the sum of its proper divisors (114260642764).

228521285522 is a wasteful number, since it uses less digits than its factorization.

228521285522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114260642763.

The product of its digits is 512000, while the sum is 44.

The spelling of 228521285522 in words is "two hundred twenty-eight billion, five hundred twenty-one million, two hundred eighty-five thousand, five hundred twenty-two".