209266142 has 16 divisors (see below), whose sum is σ = 317723472. Its totient is φ = 103363200.

The previous prime is 209266139. The next prime is 209266153. The reversal of 209266142 is 241662902.

It is a junction number, because it is equal to n+sod(n) for n = 209266099 and 209266108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118913 + ... + 120659.

It is an arithmetic number, because the mean of its divisors is an integer number (19857717).

Almost surely, 2^209266142 is an apocalyptic number.

209266142 is a deficient number, since it is larger than the sum of its proper divisors (108457330).

209266142 is a wasteful number, since it uses less digits than its factorization.

209266142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 209266142 is about 14466.0340798714. The cubic root of 209266142 is about 593.6990070778.

The spelling of 209266142 in words is "two hundred nine million, two hundred sixty-six thousand, one hundred forty-two".