261715351 has 8 divisors (see below), whose sum is σ = 265757184. Its totient is φ = 257694840.

The previous prime is 261715331. The next prime is 261715369. The reversal of 261715351 is 153517162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261715351 - 2⁹ = 261714839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261715331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20346 + ... + 30616.

It is an arithmetic number, because the mean of its divisors is an integer number (33219648).

Almost surely, 2^261715351 is an apocalyptic number.

261715351 is a deficient number, since it is larger than the sum of its proper divisors (4041833).

261715351 is a wasteful number, since it uses less digits than its factorization.

261715351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10661.

The product of its digits is 6300, while the sum is 31.

The square root of 261715351 is about 16177.6188297289. The cubic root of 261715351 is about 639.6509742432.

The spelling of 261715351 in words is "two hundred sixty-one million, seven hundred fifteen thousand, three hundred fifty-one".