32213457 has 10 divisors (see below), whose sum is σ = 48121458. Its totient is φ = 21475584.

The previous prime is 32213443. The next prime is 32213477. The reversal of 32213457 is 75431223.

It can be written as a sum of positive squares in only one way, i.e., 23970816 + 8242641 = 4896^2 + 2871^2 .

It is not a de Polignac number, because 32213457 - 2⁶ = 32213393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 32213457.

It is not an unprimeable number, because it can be changed into a prime (32213477) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 198768 + ... + 198929.

Almost surely, 2^32213457 is an apocalyptic number.

It is an amenable number.

32213457 is a deficient number, since it is larger than the sum of its proper divisors (15908001).

32213457 is an equidigital number, since it uses as much as digits as its factorization.

32213457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397709 (or 397700 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 32213457 is about 5675.6900021055. The cubic root of 32213457 is about 318.1845671179.

The spelling of 32213457 in words is "thirty-two million, two hundred thirteen thousand, four hundred fifty-seven".