261153047 has 8 divisors (see below), whose sum is σ = 265025376. Its totient is φ = 257288832.

The previous prime is 261153041. The next prime is 261153071. The reversal of 261153047 is 740351162.

261153047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 261153047 - 2⁸ = 261152791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261153041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98483 + ... + 101099.

It is an arithmetic number, because the mean of its divisors is an integer number (33128172).

Almost surely, 2^261153047 is an apocalyptic number.

261153047 is a deficient number, since it is larger than the sum of its proper divisors (3872329).

261153047 is a wasteful number, since it uses less digits than its factorization.

261153047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4057.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 261153047 is about 16160.2304129613. The cubic root of 261153047 is about 639.1925420808.

The spelling of 261153047 in words is "two hundred sixty-one million, one hundred fifty-three thousand, forty-seven".