261032615 has 8 divisors (see below), whose sum is σ = 314046720. Its totient is φ = 208287712.

The previous prime is 261032573. The next prime is 261032627. The reversal of 261032615 is 516230162.

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 261032615 - 2¹⁰ = 261031591 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65159 + ... + 69048.

It is an arithmetic number, because the mean of its divisors is an integer number (39255840).

Almost surely, 2^261032615 is an apocalyptic number.

261032615 is a deficient number, since it is larger than the sum of its proper divisors (53014105).

261032615 is a wasteful number, since it uses less digits than its factorization.

261032615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134601.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 261032615 is about 16156.5037987802. The cubic root of 261032615 is about 639.0942713883.

Adding to 261032615 its reverse (516230162), we get a palindrome (777262777).

The spelling of 261032615 in words is "two hundred sixty-one million, thirty-two thousand, six hundred fifteen".