261433153 has 8 divisors (see below), whose sum is σ = 267051816. Its totient is φ = 255840000.

The previous prime is 261433093. The next prime is 261433169. The reversal of 261433153 is 351334162.

261433153 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 127961344 + 133471809 = 11312^2 + 11553^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261433153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261433553) 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, 15103 + ... + 27403.

It is an arithmetic number, because the mean of its divisors is an integer number (33381477).

Almost surely, 2^261433153 is an apocalyptic number.

It is an amenable number.

261433153 is a deficient number, since it is larger than the sum of its proper divisors (5618663).

261433153 is a wasteful number, since it uses less digits than its factorization.

261433153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12755.

The product of its digits is 6480, while the sum is 28.

The square root of 261433153 is about 16168.8946128052. The cubic root of 261433153 is about 639.4209875519.

The spelling of 261433153 in words is "two hundred sixty-one million, four hundred thirty-three thousand, one hundred fifty-three".