161153431 has 2 divisors, whose sum is σ = 161153432. Its totient is φ = 161153430.

The previous prime is 161153423. The next prime is 161153441. The reversal of 161153431 is 134351161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161153431 - 2³ = 161153423 is a prime.

It is a super-2 number, since 2×161153431² = 51940856646143522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161153396 and 161153405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161153441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80576715 + 80576716.

It is an arithmetic number, because the mean of its divisors is an integer number (80576716).

Almost surely, 2^161153431 is an apocalyptic number.

161153431 is a deficient number, since it is larger than the sum of its proper divisors (1).

161153431 is an equidigital number, since it uses as much as digits as its factorization.

161153431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 25.

The square root of 161153431 is about 12694.6221290750. The cubic root of 161153431 is about 544.1849399586.

The spelling of 161153431 in words is "one hundred sixty-one million, one hundred fifty-three thousand, four hundred thirty-one".