83212956 has 18 divisors (see below), whose sum is σ = 210343952. Its totient is φ = 27737640.

The previous prime is 83212907. The next prime is 83212957. The reversal of 83212956 is 65921238.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2311471 = 83212956 / (8 + 3 + 2 + 1 + 2 + 9 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 83212956.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83212957) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1155700 + ... + 1155771.

Almost surely, 2^83212956 is an apocalyptic number.

It is an amenable number.

83212956 is an abundant number, since it is smaller than the sum of its proper divisors (127130996).

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

83212956 is a wasteful number, since it uses less digits than its factorization.

83212956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311481 (or 2311476 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 83212956 is about 9122.1135708782. The cubic root of 83212956 is about 436.5798124428.

The spelling of 83212956 in words is "eighty-three million, two hundred twelve thousand, nine hundred fifty-six".