261552103 has 4 divisors (see below), whose sum is σ = 262328560. Its totient is φ = 260775648.

The previous prime is 261552091. The next prime is 261552107. The reversal of 261552103 is 301255162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261552103 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 (261552107) 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, 387723 + ... + 388396.

It is an arithmetic number, because the mean of its divisors is an integer number (65582140).

Almost surely, 2^261552103 is an apocalyptic number.

261552103 is a deficient number, since it is larger than the sum of its proper divisors (776457).

261552103 is an equidigital number, since it uses as much as digits as its factorization.

261552103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776456.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 261552103 is about 16172.5725535550. The cubic root of 261552103 is about 639.5179499979.

The spelling of 261552103 in words is "two hundred sixty-one million, five hundred fifty-two thousand, one hundred three".