261562534 has 16 divisors (see below), whose sum is σ = 402363360. Its totient is φ = 127448640.

The previous prime is 261562529. The next prime is 261562541. The reversal of 261562534 is 435265162.

261562534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 261562534.

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, 145312 + ... + 147100.

It is an arithmetic number, because the mean of its divisors is an integer number (25147710).

Almost surely, 2^261562534 is an apocalyptic number.

261562534 is a deficient number, since it is larger than the sum of its proper divisors (140800826).

261562534 is a wasteful number, since it uses less digits than its factorization.

261562534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3615.

The product of its digits is 43200, while the sum is 34.

The square root of 261562534 is about 16172.8950407773. The cubic root of 261562534 is about 639.5264514564.

The spelling of 261562534 in words is "two hundred sixty-one million, five hundred sixty-two thousand, five hundred thirty-four".