261825084 has 36 divisors (see below), whose sum is σ = 666679104. Its totient is φ = 86636352.

The previous prime is 261825071. The next prime is 261825119. The reversal of 261825084 is 480528162.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×261825084² = 137104749223214112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21612 + ... + 31475.

It is an arithmetic number, because the mean of its divisors is an integer number (18518864).

Almost surely, 2^261825084 is an apocalyptic number.

It is an amenable number.

261825084 is an abundant number, since it is smaller than the sum of its proper divisors (404854020).

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

261825084 is a wasteful number, since it uses less digits than its factorization.

261825084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53234 (or 53229 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 261825084 is about 16181.0099808386. The cubic root of 261825084 is about 639.7403601765.

The spelling of 261825084 in words is "two hundred sixty-one million, eight hundred twenty-five thousand, eighty-four".