161326051 has 2 divisors, whose sum is σ = 161326052. Its totient is φ = 161326050.

The previous prime is 161326019. The next prime is 161326069. The reversal of 161326051 is 150623161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161326051 - 2⁵ = 161326019 is a prime.

It is not a weakly prime, because it can be changed into another prime (161326951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80663025 + 80663026.

It is an arithmetic number, because the mean of its divisors is an integer number (80663026).

Almost surely, 2^161326051 is an apocalyptic number.

161326051 is a deficient number, since it is larger than the sum of its proper divisors (1).

161326051 is an equidigital number, since it uses as much as digits as its factorization.

161326051 is an evil number, because the sum of its binary digits is even.

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

The square root of 161326051 is about 12701.4192514065. The cubic root of 161326051 is about 544.3791724224.

The spelling of 161326051 in words is "one hundred sixty-one million, three hundred twenty-six thousand, fifty-one".