170561213 has 2 divisors, whose sum is σ = 170561214. Its totient is φ = 170561212.

The previous prime is 170561207. The next prime is 170561227. The reversal of 170561213 is 312165071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94051204 + 76510009 = 9698^2 + 8747^2 .

It is a cyclic number.

It is not a de Polignac number, because 170561213 - 2¹⁰ = 170560189 is a prime.

It is a super-2 number, since 2×170561213² = 58182254760062738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170561203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85280606 + 85280607.

It is an arithmetic number, because the mean of its divisors is an integer number (85280607).

Almost surely, 2^170561213 is an apocalyptic number.

It is an amenable number.

170561213 is a deficient number, since it is larger than the sum of its proper divisors (1).

170561213 is an equidigital number, since it uses as much as digits as its factorization.

170561213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 170561213 is about 13059.9086137691. The cubic root of 170561213 is about 554.5747498657.

The spelling of 170561213 in words is "one hundred seventy million, five hundred sixty-one thousand, two hundred thirteen".