209213948 has 12 divisors (see below), whose sum is σ = 366371040. Its totient is φ = 104536512.

The previous prime is 209213891. The next prime is 209213971. The reversal of 209213948 is 849312902.

209213948 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10628 + ... + 23051.

It is an arithmetic number, because the mean of its divisors is an integer number (30530920).

Almost surely, 2^209213948 is an apocalyptic number.

It is an amenable number.

209213948 is a deficient number, since it is larger than the sum of its proper divisors (157157092).

209213948 is a wasteful number, since it uses less digits than its factorization.

209213948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35236 (or 35234 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 209213948 is about 14464.2299483934. The cubic root of 209213948 is about 593.6496439362.

The spelling of 209213948 in words is "two hundred nine million, two hundred thirteen thousand, nine hundred forty-eight".