421525331 has 2 divisors, whose sum is σ = 421525332. Its totient is φ = 421525330.

The previous prime is 421525309. The next prime is 421525339. The reversal of 421525331 is 133525124.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421525331 is a prime.

It is a super-2 number, since 2×421525331² = 355367209349319122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421525331.

It is not a weakly prime, because it can be changed into another prime (421525339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210762665 + 210762666.

It is an arithmetic number, because the mean of its divisors is an integer number (210762666).

Almost surely, 2^421525331 is an apocalyptic number.

421525331 is a deficient number, since it is larger than the sum of its proper divisors (1).

421525331 is an equidigital number, since it uses as much as digits as its factorization.

421525331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 26.

The square root of 421525331 is about 20531.0820708505. The cubic root of 421525331 is about 749.7927314657.

The spelling of 421525331 in words is "four hundred twenty-one million, five hundred twenty-five thousand, three hundred thirty-one".