170157213 has 16 divisors (see below), whose sum is σ = 252339840. Its totient is φ = 113323392.

The previous prime is 170157209. The next prime is 170157223. The reversal of 170157213 is 312751071.

It is a happy number.

It is not a de Polignac number, because 170157213 - 2² = 170157209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170157203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30445 + ... + 35597.

It is an arithmetic number, because the mean of its divisors is an integer number (15771240).

Almost surely, 2^170157213 is an apocalyptic number.

It is an amenable number.

170157213 is a deficient number, since it is larger than the sum of its proper divisors (82182627).

170157213 is a wasteful number, since it uses less digits than its factorization.

170157213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6385 (or 6379 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 27.

The square root of 170157213 is about 13044.4322605470. The cubic root of 170157213 is about 554.1365390019.

The spelling of 170157213 in words is "one hundred seventy million, one hundred fifty-seven thousand, two hundred thirteen".