161156263 has 4 divisors (see below), whose sum is σ = 161184088. Its totient is φ = 161128440.

The previous prime is 161156227. The next prime is 161156299. The reversal of 161156263 is 362651161.

161156263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (161156227) and next prime (161156299).

It is a cyclic number.

It is not a de Polignac number, because 161156263 - 2⁹ = 161155751 is a prime.

It is a super-2 number, since 2×161156263² = 51942682208250338, 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 (161156213) 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, 1581 + ... + 18022.

It is an arithmetic number, because the mean of its divisors is an integer number (40296022).

Almost surely, 2^161156263 is an apocalyptic number.

161156263 is a deficient number, since it is larger than the sum of its proper divisors (27825).

161156263 is an equidigital number, since it uses as much as digits as its factorization.

161156263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27824.

The product of its digits is 6480, while the sum is 31.

The square root of 161156263 is about 12694.7336718814. The cubic root of 161156263 is about 544.1881276510.

The spelling of 161156263 in words is "one hundred sixty-one million, one hundred fifty-six thousand, two hundred sixty-three".