209450152 has 8 divisors (see below), whose sum is σ = 392719050. Its totient is φ = 104725072.

The previous prime is 209450147. The next prime is 209450159. The reversal of 209450152 is 251054902.

It can be written as a sum of positive squares in only one way, i.e., 115476516 + 93973636 = 10746^2 + 9694^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 209450152.

It is not an unprimeable number, because it can be changed into a prime (209450159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13090627 + ... + 13090642.

Almost surely, 2^209450152 is an apocalyptic number.

It is an amenable number.

209450152 is a deficient number, since it is larger than the sum of its proper divisors (183268898).

209450152 is a wasteful number, since it uses less digits than its factorization.

209450152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26181275 (or 26181271 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 209450152 is about 14472.3927531006. The cubic root of 209450152 is about 593.8729714345.

The spelling of 209450152 in words is "two hundred nine million, four hundred fifty thousand, one hundred fifty-two".