32856981 has 4 divisors (see below), whose sum is σ = 43809312. Its totient is φ = 21904652.

The previous prime is 32856977. The next prime is 32856983. The reversal of 32856981 is 18965823.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 32856981 - 2² = 32856977 is a prime.

It is a super-2 number, since 2×32856981² = 2159162400868722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32856983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5476161 + ... + 5476166.

It is an arithmetic number, because the mean of its divisors is an integer number (10952328).

Almost surely, 2^32856981 is an apocalyptic number.

It is an amenable number.

32856981 is a deficient number, since it is larger than the sum of its proper divisors (10952331).

32856981 is a wasteful number, since it uses less digits than its factorization.

32856981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10952330.

The product of its digits is 103680, while the sum is 42.

The square root of 32856981 is about 5732.1009237451. The cubic root of 32856981 is about 320.2893899059.

The spelling of 32856981 in words is "thirty-two million, eight hundred fifty-six thousand, nine hundred eighty-one".