212453530 has 16 divisors (see below), whose sum is σ = 399043584. Its totient is φ = 81286480.

The previous prime is 212453503. The next prime is 212453537. The reversal of 212453530 is 35354212.

212453530 = 437² + 438² + ... + 896².

It is a junction number, because it is equal to n+sod(n) for n = 212453495 and 212453504.

It is not an unprimeable number, because it can be changed into a prime (212453537) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 461626 + ... + 462085.

It is an arithmetic number, because the mean of its divisors is an integer number (24940224).

Almost surely, 2^212453530 is an apocalyptic number.

212453530 is a deficient number, since it is larger than the sum of its proper divisors (186590054).

212453530 is a wasteful number, since it uses less digits than its factorization.

212453530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923741.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 212453530 is about 14575.7857421135. The cubic root of 212453530 is about 596.6980938404.

The spelling of 212453530 in words is "two hundred twelve million, four hundred fifty-three thousand, five hundred thirty".