212205154 has 32 divisors (see below), whose sum is σ = 369452160. Its totient is φ = 89538048.

The previous prime is 212205131. The next prime is 212205173. The reversal of 212205154 is 451502212.

212205154 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 416652 + ... + 417160.

It is an arithmetic number, because the mean of its divisors is an integer number (11545380).

Almost surely, 2^212205154 is an apocalyptic number.

212205154 is a deficient number, since it is larger than the sum of its proper divisors (157247006).

212205154 is a wasteful number, since it uses less digits than its factorization.

212205154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 212205154 is about 14567.2630922902. The cubic root of 212205154 is about 596.4654731222.

Adding to 212205154 its reverse (451502212), we get a palindrome (663707366).

It can be divided in two parts, 212205 and 154, that multiplied together give a triangular number (32679570 = T₈₀₈₄).

The spelling of 212205154 in words is "two hundred twelve million, two hundred five thousand, one hundred fifty-four".