211225530442 has 4 divisors (see below), whose sum is σ = 316838295666. Its totient is φ = 105612765220.

The previous prime is 211225530317. The next prime is 211225530457. The reversal of 211225530442 is 244035522112.

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., 169784378401 + 41441152041 = 412049^2 + 203571^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52806382609 + ... + 52806382612.

Almost surely, 2^211225530442 is an apocalyptic number.

211225530442 is a deficient number, since it is larger than the sum of its proper divisors (105612765224).

211225530442 is a wasteful number, since it uses less digits than its factorization.

211225530442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105612765223.

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 211225530442 in words is "two hundred eleven billion, two hundred twenty-five million, five hundred thirty thousand, four hundred forty-two".