212961530 has 16 divisors (see below), whose sum is σ = 387127944. Its totient is φ = 84340800.

The previous prime is 212961521. The next prime is 212961569. The reversal of 212961530 is 35169212.

212961530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 208196041 + 4765489 = 14429^2 + 2183^2 .

It is a super-2 number, since 2×212961530² = 90705226519881800, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212961493 and 212961502.

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, 104417 + ... + 106436.

Almost surely, 2^212961530 is an apocalyptic number.

212961530 is a deficient number, since it is larger than the sum of its proper divisors (174166414).

212961530 is a wasteful number, since it uses less digits than its factorization.

212961530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210961.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 212961530 is about 14593.2014993284. The cubic root of 212961530 is about 597.1733057642.

The spelling of 212961530 in words is "two hundred twelve million, nine hundred sixty-one thousand, five hundred thirty".