212513530 has 8 divisors (see below), whose sum is σ = 382524372. Its totient is φ = 85005408.

The previous prime is 212513527. The next prime is 212513531. The reversal of 212513530 is 35315212.

It can be written as a sum of positive squares in 2 ways, for example, as 194797849 + 17715681 = 13957^2 + 4209^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (212513531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10625667 + ... + 10625686.

Almost surely, 2^212513530 is an apocalyptic number.

212513530 is a deficient number, since it is larger than the sum of its proper divisors (170010842).

212513530 is a wasteful number, since it uses less digits than its factorization.

212513530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21251360.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 212513530 is about 14577.8438048979. The cubic root of 212513530 is about 596.7542606577.

Adding to 212513530 its reverse (35315212), we get a palindrome (247828742).

The spelling of 212513530 in words is "two hundred twelve million, five hundred thirteen thousand, five hundred thirty".