32472821 has 2 divisors, whose sum is σ = 32472822. Its totient is φ = 32472820.

The previous prime is 32472799. The next prime is 32472851. The reversal of 32472821 is 12827423.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32376100 + 96721 = 5690^2 + 311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32472821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32472851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16236410 + 16236411.

It is an arithmetic number, because the mean of its divisors is an integer number (16236411).

Almost surely, 2^32472821 is an apocalyptic number.

It is an amenable number.

32472821 is a deficient number, since it is larger than the sum of its proper divisors (1).

32472821 is an equidigital number, since it uses as much as digits as its factorization.

32472821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 29.

The square root of 32472821 is about 5698.4928709265. The cubic root of 32472821 is about 319.0362311157.

The spelling of 32472821 in words is "thirty-two million, four hundred seventy-two thousand, eight hundred twenty-one".