212451530 has 8 divisors (see below), whose sum is σ = 382412772. Its totient is φ = 84980608.

The previous prime is 212451511. The next prime is 212451541. The reversal of 212451530 is 35154212.

It can be written as a sum of positive squares in 2 ways, for example, as 210511081 + 1940449 = 14509^2 + 1393^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 212451496 and 212451505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10622567 + ... + 10622586.

Almost surely, 2^212451530 is an apocalyptic number.

212451530 is a deficient number, since it is larger than the sum of its proper divisors (169961242).

212451530 is a wasteful number, since it uses less digits than its factorization.

212451530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21245160.

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

The square root of 212451530 is about 14575.7171350160. The cubic root of 212451530 is about 596.6962214310.

The spelling of 212451530 in words is "two hundred twelve million, four hundred fifty-one thousand, five hundred thirty".