261521848 has 16 divisors (see below), whose sum is σ = 560404080. Its totient is φ = 112080768.

The previous prime is 261521791. The next prime is 261521849. The reversal of 261521848 is 848125162.

261521848 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261521849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2334961 + ... + 2335072.

It is an arithmetic number, because the mean of its divisors is an integer number (35025255).

Almost surely, 2^261521848 is an apocalyptic number.

261521848 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

261521848 is an abundant number, since it is smaller than the sum of its proper divisors (298882232).

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

261521848 is a wasteful number, since it uses less digits than its factorization.

261521848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4670046 (or 4670042 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 261521848 is about 16171.6371465600. The cubic root of 261521848 is about 639.4932903329.

The spelling of 261521848 in words is "two hundred sixty-one million, five hundred twenty-one thousand, eight hundred forty-eight".