212522051 has 4 divisors (see below), whose sum is σ = 242882352. Its totient is φ = 182161752.

The previous prime is 212522033. The next prime is 212522059. The reversal of 212522051 is 150225212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212522051 - 2²² = 208327747 is a prime.

It is a super-2 number, since 2×212522051² = 90331244322493202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212522059) 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 in 3 ways as a sum of consecutive naturals, for example, 15180140 + ... + 15180153.

It is an arithmetic number, because the mean of its divisors is an integer number (60720588).

Almost surely, 2^212522051 is an apocalyptic number.

212522051 is a deficient number, since it is larger than the sum of its proper divisors (30360301).

212522051 is an equidigital number, since it uses as much as digits as its factorization.

212522051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30360300.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 212522051 is about 14578.1360605531. The cubic root of 212522051 is about 596.7622364245.

Adding to 212522051 its reverse (150225212), we get a palindrome (362747263).

The spelling of 212522051 in words is "two hundred twelve million, five hundred twenty-two thousand, fifty-one".