163213550 has 12 divisors (see below), whose sum is σ = 303577296. Its totient is φ = 65285400.

The previous prime is 163213517. The next prime is 163213573. The reversal of 163213550 is 55312361.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1632086 + ... + 1632185.

It is an arithmetic number, because the mean of its divisors is an integer number (25298108).

Almost surely, 2^163213550 is an apocalyptic number.

163213550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163213550 is a deficient number, since it is larger than the sum of its proper divisors (140363746).

163213550 is a wasteful number, since it uses less digits than its factorization.

163213550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3264283 (or 3264278 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 163213550 is about 12775.5058608260. The cubic root of 163213550 is about 546.4940069606.

The spelling of 163213550 in words is "one hundred sixty-three million, two hundred thirteen thousand, five hundred fifty".