161650051 has 2 divisors, whose sum is σ = 161650052. Its totient is φ = 161650050.

The previous prime is 161650039. The next prime is 161650079. The reversal of 161650051 is 150056161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161650051 - 2⁵ = 161650019 is a prime.

It is a super-2 number, since 2×161650051² = 52261477976605202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161649998 and 161650025.

It is not a weakly prime, because it can be changed into another prime (161650001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80825025 + 80825026.

It is an arithmetic number, because the mean of its divisors is an integer number (80825026).

Almost surely, 2^161650051 is an apocalyptic number.

161650051 is a deficient number, since it is larger than the sum of its proper divisors (1).

161650051 is an equidigital number, since it uses as much as digits as its factorization.

161650051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 161650051 is about 12714.1673341198. The cubic root of 161650051 is about 544.7433642878.

The spelling of 161650051 in words is "one hundred sixty-one million, six hundred fifty thousand, fifty-one".