161427231 has 12 divisors (see below), whose sum is σ = 266483152. Its totient is φ = 92244096.

The previous prime is 161427197. The next prime is 161427283. The reversal of 161427231 is 132724161.

161427231 is a `hidden beast` number, since 1 + 6 + 1 + 427 + 231 = 666.

It is not a de Polignac number, because 161427231 - 2⁷ = 161427103 is a prime.

It is a super-2 number, since 2×161427231² = 52117501816654722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161427195 and 161427204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161427131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1281106 + ... + 1281231.

Almost surely, 2^161427231 is an apocalyptic number.

161427231 is a deficient number, since it is larger than the sum of its proper divisors (105055921).

161427231 is a wasteful number, since it uses less digits than its factorization.

161427231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562350 (or 2562347 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 161427231 is about 12705.4016465439. The cubic root of 161427231 is about 544.4929560164.

The spelling of 161427231 in words is "one hundred sixty-one million, four hundred twenty-seven thousand, two hundred thirty-one".