161063131 has 4 divisors (see below), whose sum is σ = 164102112. Its totient is φ = 158024152.

The previous prime is 161063113. The next prime is 161063137. The reversal of 161063131 is 131360161.

It is a happy number.

161063131 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, and also an emirpimes, since its reverse is a distinct semiprime: 131360161 = 4801 ⋅27361.

It is a cyclic number.

It is not a de Polignac number, because 161063131 - 2⁵ = 161063099 is a prime.

It is a super-2 number, since 2×161063131² = 51882664335046322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161063137) 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, 1519411 + ... + 1519516.

It is an arithmetic number, because the mean of its divisors is an integer number (41025528).

Almost surely, 2^161063131 is an apocalyptic number.

161063131 is a deficient number, since it is larger than the sum of its proper divisors (3038981).

161063131 is an equidigital number, since it uses as much as digits as its factorization.

161063131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3038980.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 161063131 is about 12691.0650065312. The cubic root of 161063131 is about 544.0832789082.

The spelling of 161063131 in words is "one hundred sixty-one million, sixty-three thousand, one hundred thirty-one".