261015304 has 16 divisors (see below), whose sum is σ = 533895120. Its totient is φ = 118643280.

The previous prime is 261015281. The next prime is 261015361. The reversal of 261015304 is 403510162.

261015304 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1482954 + ... + 1483129.

It is an arithmetic number, because the mean of its divisors is an integer number (33368445).

Almost surely, 2^261015304 is an apocalyptic number.

It is an amenable number.

261015304 is an abundant number, since it is smaller than the sum of its proper divisors (272879816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261015304 is a wasteful number, since it uses less digits than its factorization.

261015304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2966100 (or 2966096 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 261015304 is about 16155.9680613698. The cubic root of 261015304 is about 639.0801433894.

Adding to 261015304 its reverse (403510162), we get a palindrome (664525466).

The spelling of 261015304 in words is "two hundred sixty-one million, fifteen thousand, three hundred four".