212151450 has 48 divisors (see below), whose sum is σ = 601300800. Its totient is φ = 48491520.

The previous prime is 212151353. The next prime is 212151491. The reversal of 212151450 is 54151212.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 99975 + ... + 102074.

It is an arithmetic number, because the mean of its divisors is an integer number (12527100).

Almost surely, 2^212151450 is an apocalyptic number.

212151450 is an abundant number, since it is smaller than the sum of its proper divisors (389149350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212151450 is a wasteful number, since it uses less digits than its factorization.

212151450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202071 (or 202066 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 212151450 is about 14565.4196643969. The cubic root of 212151450 is about 596.4151518745.

The spelling of 212151450 in words is "two hundred twelve million, one hundred fifty-one thousand, four hundred fifty".