191022212 has 6 divisors (see below), whose sum is σ = 334288878. Its totient is φ = 95511104.

The previous prime is 191022203. The next prime is 191022233. The reversal of 191022212 is 212220191.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 165276736 + 25745476 = 12856^2 + 5074^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23877773 + ... + 23877780.

It is an arithmetic number, because the mean of its divisors is an integer number (55714813).

Almost surely, 2^191022212 is an apocalyptic number.

It is an amenable number.

191022212 is a deficient number, since it is larger than the sum of its proper divisors (143266666).

191022212 is a wasteful number, since it uses less digits than its factorization.

191022212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47755557 (or 47755555 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 191022212 is about 13821.0785396799. The cubic root of 191022212 is about 575.9188454658.

It can be divided in two parts, 19 and 1022212, that multiplied together give a triangular number (19422028 = T₆₂₃₂).

The spelling of 191022212 in words is "one hundred ninety-one million, twenty-two thousand, two hundred twelve".