261305050 has 12 divisors (see below), whose sum is σ = 486027486. Its totient is φ = 104522000.

The previous prime is 261305039. The next prime is 261305069. The reversal of 261305050 is 50503162.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 235100889 + 26204161 = 15333^2 + 5119^2 .

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, 2613001 + ... + 2613100.

Almost surely, 2^261305050 is an apocalyptic number.

261305050 is a deficient number, since it is larger than the sum of its proper divisors (224722436).

261305050 is a wasteful number, since it uses less digits than its factorization.

261305050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5226113 (or 5226108 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 261305050 is about 16164.9327248832. The cubic root of 261305050 is about 639.3165311118.

The spelling of 261305050 in words is "two hundred sixty-one million, three hundred five thousand, fifty".