161228247 has 8 divisors (see below), whose sum is σ = 217561344. Its totient is φ = 106190328.

The previous prime is 161228237. The next prime is 161228261. The reversal of 161228247 is 742822161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161228247 - 2⁸ = 161227991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161228237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323503 + ... + 324000.

It is an arithmetic number, because the mean of its divisors is an integer number (27195168).

Almost surely, 2^161228247 is an apocalyptic number.

161228247 is a deficient number, since it is larger than the sum of its proper divisors (56333097).

161228247 is an equidigital number, since it uses as much as digits as its factorization.

161228247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647589.

The product of its digits is 10752, while the sum is 33.

The square root of 161228247 is about 12697.5685467730. The cubic root of 161228247 is about 544.2691401342.

The spelling of 161228247 in words is "one hundred sixty-one million, two hundred twenty-eight thousand, two hundred forty-seven".