355120261 has 4 divisors (see below), whose sum is σ = 355226272. Its totient is φ = 355014252.

The previous prime is 355120243. The next prime is 355120289. The reversal of 355120261 is 162021553.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 162021553 = 317 ⋅511109.

It is a cyclic number.

It is not a de Polignac number, because 355120261 - 2¹¹ = 355118213 is a prime.

It is a super-2 number, since 2×355120261² = 252220799545416242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355120211) 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 3 ways as a sum of consecutive naturals, for example, 47811 + ... + 54736.

It is an arithmetic number, because the mean of its divisors is an integer number (88806568).

Almost surely, 2^355120261 is an apocalyptic number.

It is an amenable number.

355120261 is a deficient number, since it is larger than the sum of its proper divisors (106011).

355120261 is a wasteful number, since it uses less digits than its factorization.

355120261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106010.

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

The square root of 355120261 is about 18844.6348067560. The cubic root of 355120261 is about 708.1498221296.

The spelling of 355120261 in words is "three hundred fifty-five million, one hundred twenty thousand, two hundred sixty-one".