161342651 has 2 divisors, whose sum is σ = 161342652. Its totient is φ = 161342650.

The previous prime is 161342647. The next prime is 161342659. The reversal of 161342651 is 156243161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161342651 - 2² = 161342647 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161342659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80671325 + 80671326.

It is an arithmetic number, because the mean of its divisors is an integer number (80671326).

Almost surely, 2^161342651 is an apocalyptic number.

161342651 is a deficient number, since it is larger than the sum of its proper divisors (1).

161342651 is an equidigital number, since it uses as much as digits as its factorization.

161342651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 29.

The square root of 161342651 is about 12702.0727048777. The cubic root of 161342651 is about 544.3978434808.

The spelling of 161342651 in words is "one hundred sixty-one million, three hundred forty-two thousand, six hundred fifty-one".