32431661 has 4 divisors (see below), whose sum is σ = 32525472. Its totient is φ = 32337852.

The previous prime is 32431643. The next prime is 32431691. The reversal of 32431661 is 16613423.

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: 16613423 = 3361 ⋅4943.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32431661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 32431661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32431691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46385 + ... + 47078.

It is an arithmetic number, because the mean of its divisors is an integer number (8131368).

Almost surely, 2^32431661 is an apocalyptic number.

It is an amenable number.

32431661 is a deficient number, since it is larger than the sum of its proper divisors (93811).

32431661 is an equidigital number, since it uses as much as digits as its factorization.

32431661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93810.

The product of its digits is 2592, while the sum is 26.

The square root of 32431661 is about 5694.8802445706. The cubic root of 32431661 is about 318.9013790256.

The spelling of 32431661 in words is "thirty-two million, four hundred thirty-one thousand, six hundred sixty-one".