212163550 has 48 divisors (see below), whose sum is σ = 411103152. Its totient is φ = 81388800.

The previous prime is 212163547. The next prime is 212163619. The reversal of 212163550 is 55361212.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134265 + ... + 135835.

It is an arithmetic number, because the mean of its divisors is an integer number (8564649).

Almost surely, 2^212163550 is an apocalyptic number.

212163550 is a deficient number, since it is larger than the sum of its proper divisors (198939602).

212163550 is a wasteful number, since it uses less digits than its factorization.

212163550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693 (or 1688 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 212163550 is about 14565.8350258404. The cubic root of 212163550 is about 596.4264904507.

The spelling of 212163550 in words is "two hundred twelve million, one hundred sixty-three thousand, five hundred fifty".