212981976 has 96 divisors (see below), whose sum is σ = 591973200. Its totient is φ = 69154560.

The previous prime is 212981971. The next prime is 212982031. The reversal of 212981976 is 679189212.

212981976 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212981976² = 90722644201729152, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212981971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 768750 + ... + 769026.

Almost surely, 2^212981976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212981976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295986600).

212981976 is an abundant number, since it is smaller than the sum of its proper divisors (378991224).

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

212981976 is a wasteful number, since it uses less digits than its factorization.

212981976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 522 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 212981976 is about 14593.9020141976. The cubic root of 212981976 is about 597.1924162810.

The spelling of 212981976 in words is "two hundred twelve million, nine hundred eighty-one thousand, nine hundred seventy-six".