421512151 has 2 divisors, whose sum is σ = 421512152. Its totient is φ = 421512150.

The previous prime is 421512149. The next prime is 421512167. The reversal of 421512151 is 151215124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421512151 - 2¹ = 421512149 is a prime.

Together with 421512149, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421512181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210756075 + 210756076.

It is an arithmetic number, because the mean of its divisors is an integer number (210756076).

Almost surely, 2^421512151 is an apocalyptic number.

421512151 is a deficient number, since it is larger than the sum of its proper divisors (1).

421512151 is an equidigital number, since it uses as much as digits as its factorization.

421512151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 400, while the sum is 22.

The square root of 421512151 is about 20530.7610915913. The cubic root of 421512151 is about 749.7849166952.

Adding to 421512151 its reverse (151215124), we get a palindrome (572727275).

The spelling of 421512151 in words is "four hundred twenty-one million, five hundred twelve thousand, one hundred fifty-one".