162551009 has 2 divisors, whose sum is σ = 162551010. Its totient is φ = 162551008.

The previous prime is 162550987. The next prime is 162551017. The reversal of 162551009 is 900155261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90250000 + 72301009 = 9500^2 + 8503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162551009 is a prime.

It is not a weakly prime, because it can be changed into another prime (162551029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81275504 + 81275505.

It is an arithmetic number, because the mean of its divisors is an integer number (81275505).

Almost surely, 2^162551009 is an apocalyptic number.

It is an amenable number.

162551009 is a deficient number, since it is larger than the sum of its proper divisors (1).

162551009 is an equidigital number, since it uses as much as digits as its factorization.

162551009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 162551009 is about 12749.5493645854. The cubic root of 162551009 is about 545.7535338747.

The spelling of 162551009 in words is "one hundred sixty-two million, five hundred fifty-one thousand, nine".