161588263 has 4 divisors (see below), whose sum is σ = 161618760. Its totient is φ = 161557768.

The previous prime is 161588243. The next prime is 161588269. The reversal of 161588263 is 362885161.

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 161588263 - 2¹³ = 161580071 is a prime.

It is a super-2 number, since 2×161588263² = 52221533478714338, 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 (161588269) 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, 5008 + ... + 18661.

It is an arithmetic number, because the mean of its divisors is an integer number (40404690).

Almost surely, 2^161588263 is an apocalyptic number.

161588263 is a deficient number, since it is larger than the sum of its proper divisors (30497).

161588263 is an equidigital number, since it uses as much as digits as its factorization.

161588263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30496.

The product of its digits is 69120, while the sum is 40.

The square root of 161588263 is about 12711.7372140868. The cubic root of 161588263 is about 544.6739491279.

The spelling of 161588263 in words is "one hundred sixty-one million, five hundred eighty-eight thousand, two hundred sixty-three".