163265551 has 2 divisors, whose sum is σ = 163265552. Its totient is φ = 163265550.

The previous prime is 163265549. The next prime is 163265573. The reversal of 163265551 is 155562361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 163265551 - 2¹ = 163265549 is a prime.

Together with 163265549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163265581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81632775 + 81632776.

It is an arithmetic number, because the mean of its divisors is an integer number (81632776).

Almost surely, 2^163265551 is an apocalyptic number.

163265551 is a deficient number, since it is larger than the sum of its proper divisors (1).

163265551 is an equidigital number, since it uses as much as digits as its factorization.

163265551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27000, while the sum is 34.

The square root of 163265551 is about 12777.5408823451. The cubic root of 163265551 is about 546.5520397594.

The spelling of 163265551 in words is "one hundred sixty-three million, two hundred sixty-five thousand, five hundred fifty-one".