32278013 has 4 divisors (see below), whose sum is σ = 32342688. Its totient is φ = 32213340.

The previous prime is 32277983. The next prime is 32278027. The reversal of 32278013 is 31087223.

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: 31087223 = 271 ⋅114713.

It is a cyclic number.

It is not a de Polignac number, because 32278013 - 2²² = 28083709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32278033) 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, 31583 + ... + 32588.

It is an arithmetic number, because the mean of its divisors is an integer number (8085672).

Almost surely, 2^32278013 is an apocalyptic number.

It is an amenable number.

32278013 is a deficient number, since it is larger than the sum of its proper divisors (64675).

32278013 is an equidigital number, since it uses as much as digits as its factorization.

32278013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64674.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 32278013 is about 5681.3742175639. The cubic root of 32278013 is about 318.3969733484.

The spelling of 32278013 in words is "thirty-two million, two hundred seventy-eight thousand, thirteen".