212930971 has 16 divisors (see below), whose sum is σ = 240869376. Its totient is φ = 186480000.

The previous prime is 212930957. The next prime is 212930981. The reversal of 212930971 is 179039212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212930971 - 2⁷ = 212930843 is a prime.

It is a super-2 number, since 2×212930971² = 90679196822005682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212930951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80886 + ... + 83476.

It is an arithmetic number, because the mean of its divisors is an integer number (15054336).

Almost surely, 2^212930971 is an apocalyptic number.

212930971 is a deficient number, since it is larger than the sum of its proper divisors (27938405).

212930971 is a wasteful number, since it uses less digits than its factorization.

212930971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2874.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 212930971 is about 14592.1544331192. The cubic root of 212930971 is about 597.1447405236.

The spelling of 212930971 in words is "two hundred twelve million, nine hundred thirty thousand, nine hundred seventy-one".