212158 has 16 divisors (see below), whose sum is σ = 339264. Its totient is φ = 99360.

The previous prime is 212141. The next prime is 212161. The reversal of 212158 is 851212.

It is a super-2 number, since 2×212158² = 90022033928, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3448 + ... + 3508.

It is an arithmetic number, because the mean of its divisors is an integer number (21204).

2²¹²¹⁵⁸ is an apocalyptic number.

212158 is a deficient number, since it is larger than the sum of its proper divisors (127106).

212158 is a wasteful number, since it uses less digits than its factorization.

212158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147.

The product of its digits is 160, while the sum is 19.

The square root of 212158 is about 460.6061224083. The cubic root of 212158 is about 59.6421289752.

The spelling of 212158 in words is "two hundred twelve thousand, one hundred fifty-eight".