161255303 has 4 divisors (see below), whose sum is σ = 175914888. Its totient is φ = 146595720.

The previous prime is 161255293. The next prime is 161255317. The reversal of 161255303 is 303552161.

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

It is a cyclic number.

It is not a de Polignac number, because 161255303 - 2⁶ = 161255239 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 (161251303) 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, 7329776 + ... + 7329797.

It is an arithmetic number, because the mean of its divisors is an integer number (43978722).

Almost surely, 2^161255303 is an apocalyptic number.

161255303 is a deficient number, since it is larger than the sum of its proper divisors (14659585).

161255303 is a wasteful number, since it uses less digits than its factorization.

161255303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14659584.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 161255303 is about 12698.6339029047. The cubic root of 161255303 is about 544.2995833568.

The spelling of 161255303 in words is "one hundred sixty-one million, two hundred fifty-five thousand, three hundred three".