211853972 has 12 divisors (see below), whose sum is σ = 404448576. Its totient is φ = 96297240.

The previous prime is 211853963. The next prime is 211853981. The reversal of 211853972 is 279358112.

It is an interprime number because it is at equal distance from previous prime (211853963) and next prime (211853981).

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2407388 + ... + 2407475.

It is an arithmetic number, because the mean of its divisors is an integer number (33704048).

Almost surely, 2^211853972 is an apocalyptic number.

211853972 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

211853972 is a deficient number, since it is larger than the sum of its proper divisors (192594604).

211853972 is a wasteful number, since it uses less digits than its factorization.

211853972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4814878 (or 4814876 counting only the distinct ones).

The product of its digits is 30240, while the sum is 38.

The square root of 211853972 is about 14555.2042926233. The cubic root of 211853972 is about 596.1362577522.

The spelling of 211853972 in words is "two hundred eleven million, eight hundred fifty-three thousand, nine hundred seventy-two".