211520022 has 64 divisors (see below), whose sum is σ = 500097024. Its totient is φ = 58390560.

The previous prime is 211520017. The next prime is 211520033. The reversal of 211520022 is 220025112.

It is a junction number, because it is equal to n+sod(n) for n = 211519983 and 211520010.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 163197 + ... + 164487.

It is an arithmetic number, because the mean of its divisors is an integer number (7814016).

Almost surely, 2^211520022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211520022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250048512).

211520022 is an abundant number, since it is smaller than the sum of its proper divisors (288577002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211520022 is a wasteful number, since it uses less digits than its factorization.

211520022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 211520022 is about 14543.7279264981. The cubic root of 211520022 is about 595.8228588614.

Adding to 211520022 its reverse (220025112), we get a palindrome (431545134).

The spelling of 211520022 in words is "two hundred eleven million, five hundred twenty thousand, twenty-two".