32520431 has 2 divisors, whose sum is σ = 32520432. Its totient is φ = 32520430.

The previous prime is 32520409. The next prime is 32520437. The reversal of 32520431 is 13402523.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 32520431 - 2¹⁴ = 32504047 is a prime.

It is a super-2 number, since 2×32520431² = 2115156864851522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32520437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16260215 + 16260216.

It is an arithmetic number, because the mean of its divisors is an integer number (16260216).

Almost surely, 2^32520431 is an apocalyptic number.

32520431 is a deficient number, since it is larger than the sum of its proper divisors (1).

32520431 is an equidigital number, since it uses as much as digits as its factorization.

32520431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 32520431 is about 5702.6687612030. The cubic root of 32520431 is about 319.1920732145.

Adding to 32520431 its reverse (13402523), we get a palindrome (45922954).

The spelling of 32520431 in words is "thirty-two million, five hundred twenty thousand, four hundred thirty-one".