261416315 has 16 divisors (see below), whose sum is σ = 320427360. Its totient is φ = 204679680.

The previous prime is 261416297. The next prime is 261416317. The reversal of 261416315 is 513614162.

It is a happy number.

It is not a de Polignac number, because 261416315 - 2⁶ = 261416251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261416317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69257 + ... + 72933.

It is an arithmetic number, because the mean of its divisors is an integer number (20026710).

Almost surely, 2^261416315 is an apocalyptic number.

261416315 is a deficient number, since it is larger than the sum of its proper divisors (59011045).

261416315 is a wasteful number, since it uses less digits than its factorization.

261416315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3982.

The product of its digits is 4320, while the sum is 29.

The square root of 261416315 is about 16168.3739132913. The cubic root of 261416315 is about 639.4072596299.

The spelling of 261416315 in words is "two hundred sixty-one million, four hundred sixteen thousand, three hundred fifteen".