211245530 has 16 divisors (see below), whose sum is σ = 389516904. Its totient is φ = 82437120.

The previous prime is 211245521. The next prime is 211245583. The reversal of 211245530 is 35542112.

It can be written as a sum of positive squares in 4 ways, for example, as 134490409 + 76755121 = 11597^2 + 8761^2 .

It is a junction number, because it is equal to n+sod(n) for n = 211245496 and 211245505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257207 + ... + 258026.

Almost surely, 2^211245530 is an apocalyptic number.

211245530 is a deficient number, since it is larger than the sum of its proper divisors (178271374).

211245530 is a wasteful number, since it uses less digits than its factorization.

211245530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515281.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 211245530 is about 14534.2880802604. The cubic root of 211245530 is about 595.5650118674.

Adding to 211245530 its reverse (35542112), we get a palindrome (246787642).

The spelling of 211245530 in words is "two hundred eleven million, two hundred forty-five thousand, five hundred thirty".