32261681 has 4 divisors (see below), whose sum is σ = 32424000. Its totient is φ = 32099364.

The previous prime is 32261657. The next prime is 32261701. The reversal of 32261681 is 18616223.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18616223 = 23 ⋅809401.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32261681 is a prime.

It is a super-2 number, since 2×32261681² = 2081632121891522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32261611) 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, 80861 + ... + 81258.

It is an arithmetic number, because the mean of its divisors is an integer number (8106000).

Almost surely, 2^32261681 is an apocalyptic number.

It is an amenable number.

32261681 is a deficient number, since it is larger than the sum of its proper divisors (162319).

32261681 is a wasteful number, since it uses less digits than its factorization.

32261681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162318.

The product of its digits is 3456, while the sum is 29.

The square root of 32261681 is about 5679.9367073938. The cubic root of 32261681 is about 318.3432635506.

The spelling of 32261681 in words is "thirty-two million, two hundred sixty-one thousand, six hundred eighty-one".