209697150 has 96 divisors (see below), whose sum is σ = 570900960. Its totient is φ = 50618880.

The previous prime is 209697149. The next prime is 209697161. The reversal of 209697150 is 51796902.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 209697099 and 209697108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 102336 + ... + 104364.

It is an arithmetic number, because the mean of its divisors is an integer number (5946885).

Almost surely, 2^209697150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209697150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285450480).

209697150 is an abundant number, since it is smaller than the sum of its proper divisors (361203810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

209697150 is a wasteful number, since it uses less digits than its factorization.

209697150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110 (or 2105 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 209697150 is about 14480.9236583859. The cubic root of 209697150 is about 594.1063249907.

The spelling of 209697150 in words is "two hundred nine million, six hundred ninety-seven thousand, one hundred fifty".