161063731 has 2 divisors, whose sum is σ = 161063732. Its totient is φ = 161063730.

The previous prime is 161063717. The next prime is 161063737. The reversal of 161063731 is 137360161.

161063731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (137360161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161063731 - 2¹⁵ = 161030963 is a prime.

It is a super-2 number, since 2×161063731² = 51883050887280722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161063731.

It is not a weakly prime, because it can be changed into another prime (161063737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80531865 + 80531866.

It is an arithmetic number, because the mean of its divisors is an integer number (80531866).

Almost surely, 2^161063731 is an apocalyptic number.

161063731 is a deficient number, since it is larger than the sum of its proper divisors (1).

161063731 is an equidigital number, since it uses as much as digits as its factorization.

161063731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 161063731 is about 12691.0886451872. The cubic root of 161063731 is about 544.0839545222.

It can be divided in two parts, 1610 and 63731, that added together give a triangular number (65341 = T₃₆₁).

The spelling of 161063731 in words is "one hundred sixty-one million, sixty-three thousand, seven hundred thirty-one".