261030053 has 8 divisors (see below), whose sum is σ = 276656472. Its totient is φ = 245433856.

The previous prime is 261030043. The next prime is 261030071. The reversal of 261030053 is 350030162.

It can be written as a sum of positive squares in 4 ways, for example, as 43850884 + 217179169 = 6622^2 + 14737^2 .

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 261030053 - 2¹² = 261025957 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 (261030023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11651 + ... + 25647.

It is an arithmetic number, because the mean of its divisors is an integer number (34582059).

Almost surely, 2^261030053 is an apocalyptic number.

It is an amenable number.

261030053 is a deficient number, since it is larger than the sum of its proper divisors (15626419).

261030053 is a wasteful number, since it uses less digits than its factorization.

261030053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15111.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 261030053 is about 16156.4245116300. The cubic root of 261030053 is about 639.0921805067.

The spelling of 261030053 in words is "two hundred sixty-one million, thirty thousand, fifty-three".