211690970 has 32 divisors (see below), whose sum is σ = 424699200. Its totient is φ = 75499776.

The previous prime is 211690939. The next prime is 211690993. The reversal of 211690970 is 79096112.

It is a self number, because there is not a number n which added to its sum of digits gives 211690970.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29540 + ... + 35999.

It is an arithmetic number, because the mean of its divisors is an integer number (13271850).

Almost surely, 2^211690970 is an apocalyptic number.

211690970 is an abundant number, since it is smaller than the sum of its proper divisors (213008230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211690970 is a wasteful number, since it uses less digits than its factorization.

211690970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65582.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 211690970 is about 14549.6037746737. The cubic root of 211690970 is about 595.9833279873.

The spelling of 211690970 in words is "two hundred eleven million, six hundred ninety thousand, nine hundred seventy".